add a sizegroup and alignment to line up widgets

Change-Id: I7db65ae46cd4fe5c36cdfda172adcb139b5ca4e0

starmath/uiconfig/smath/ui/fontsizedialog.ui

 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <!-- interface-requires gtk+ 3.0 -->
+  <object class="GtkAdjustment" id="adjustmentBaseSize">
+    <property name="lower">4</property>
+    <property name="upper">127</property>
+    <property name="step_increment">1</property>
+    <property name="page_increment">10</property>
+  </object>
+  <object class="GtkAdjustment" id="adjustmentRelativeSizes">
+    <property name="lower">5</property>
+    <property name="upper">200</property>
+    <property name="step_increment">1</property>
+    <property name="page_increment">10</property>
+  </object>
   <object class="GtkDialog" id="FontSizeDialog">
     <property name="can_focus">False</property>
     <property name="border_width">6</property>
@@ -23,7 +35,6 @@
                 <property name="can_default">True</property>
                 <property name="has_default">True</property>
                 <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
                 <property name="use_stock">True</property>
               </object>
               <packing>
@@ -38,7 +49,6 @@
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
                 <property name="use_stock">True</property>
               </object>
               <packing>
@@ -53,7 +63,6 @@
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
                 <property name="use_stock">True</property>
               </object>
               <packing>
@@ -68,7 +77,6 @@
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
-                <property name="use_action_appearance">False</property>
                 <property name="use_underline">True</property>
               </object>
               <packing>
@@ -93,39 +101,45 @@
             <property name="orientation">vertical</property>
             <property name="spacing">12</property>
             <child>
-              <object class="GtkBox" id="box2">
+              <object class="GtkAlignment" id="alignment2">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="hexpand">True</property>
-                <property name="spacing">12</property>
+                <property name="left_padding">12</property>
                 <child>
-                  <object class="GtkLabel" id="label4">
+                  <object class="GtkBox" id="box2">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
-                    <property name="label" translatable="yes">Base _size</property>
-                    <property name="use_underline">True</property>
-                    <property name="mnemonic_widget">spinB_baseSize:0pt</property>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">True</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkSpinButton" id="spinB_baseSize:0pt">
-                    <property name="visible">True</property>
-                    <property name="can_focus">True</property>
-                    <property name="margin_left">12</property>
                     <property name="hexpand">True</property>
-                    <property name="invisible_char">●</property>
-                    <property name="adjustment">adjustmentBaseSize</property>
+                    <property name="spacing">12</property>
+                    <child>
+                      <object class="GtkLabel" id="label4">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Base _size</property>
+                        <property name="use_underline">True</property>
+                        <property name="mnemonic_widget">spinB_baseSize:0pt</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkSpinButton" id="spinB_baseSize:0pt">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="hexpand">True</property>
+                        <property name="invisible_char">●</property>
+                        <property name="adjustment">adjustmentBaseSize</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">1</property>
+                      </packing>
+                    </child>
                   </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">True</property>
-                    <property name="position">1</property>
-                  </packing>
                 </child>
               </object>
               <packing>
@@ -155,8 +169,6 @@
                         <property name="hexpand">True</property>
                         <property name="row_spacing">6</property>
                         <property name="column_spacing">12</property>
-                        <property name="n_rows">5</property>
-                        <property name="n_columns">2</property>
                         <child>
                           <object class="GtkSpinButton" id="spinB_function:0%">
                             <property name="visible">True</property>
@@ -349,16 +361,14 @@
       <action-widget response="0">default</action-widget>
     </action-widgets>
   </object>
-  <object class="GtkAdjustment" id="adjustmentBaseSize">
-    <property name="lower">4</property>
-    <property name="upper">127</property>
-    <property name="step_increment">1</property>
-    <property name="page_increment">10</property>
-  </object>
-  <object class="GtkAdjustment" id="adjustmentRelativeSizes">
-    <property name="lower">5</property>
-    <property name="upper">200</property>
-    <property name="step_increment">1</property>
-    <property name="page_increment">10</property>
+  <object class="GtkSizeGroup" id="sizegroup1">
+    <widgets>
+      <widget name="label4"/>
+      <widget name="label2"/>
+      <widget name="label3"/>
+      <widget name="label5"/>
+      <widget name="label7"/>
+      <widget name="label6"/>
+    </widgets>
   </object>
 </interface>