set rows to 6 pixel spacing

Change-Id: I11975ef36c52b6279d099d6a5e32ce9da4cbc9ca

filter/uiconfig/ui/pdflinkspage.ui

@@ -6,6 +6,7 @@
     <property name="can_focus">False</property>
     <property name="border_width">6</property>
     <property name="orientation">vertical</property>
+    <property name="spacing">12</property>
     <child>
       <object class="GtkFrame" id="frame1">
         <property name="visible">True</property>
@@ -22,6 +23,7 @@
               <object class="GtkGrid" id="grid1">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
+                <property name="row_spacing">6</property>
                 <child>
                   <object class="GtkCheckButton" id="export">
                     <property name="label" translatable="yes">Export bookmarks as named destinations</property>
@@ -113,6 +115,7 @@
               <object class="GtkGrid" id="grid2">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
+                <property name="row_spacing">6</property>
                 <child>
                   <object class="GtkRadioButton" id="default">
                     <property name="label" translatable="yes">Default mode</property>
@@ -123,6 +126,7 @@
                     <property name="xalign">0</property>
                     <property name="active">True</property>
                     <property name="draw_indicator">True</property>
+                    <property name="group">openpdf</property>
                   </object>
                   <packing>
                     <property name="left_attach">0</property>
@@ -140,7 +144,7 @@
                     <property name="use_underline">True</property>
                     <property name="xalign">0</property>
                     <property name="draw_indicator">True</property>
-                    <property name="group">default</property>
+                    <property name="group">openinternet</property>
                   </object>
                   <packing>
                     <property name="left_attach">0</property>
@@ -158,7 +162,7 @@
                     <property name="use_underline">True</property>
                     <property name="xalign">0</property>
                     <property name="draw_indicator">True</property>
-                    <property name="group">openpdf</property>
+                    <property name="group">default</property>
                   </object>
                   <packing>
                     <property name="left_attach">0</property>