alerts have 12 border and 24 spacing

Change-Id: I5978acd24f27bb7c626df567fefcc3f384336e91

cui/uiconfig/ui/querydeletelineenddialog.ui

@@ -3,8 +3,9 @@
   <!-- interface-requires gtk+ 3.6 -->
   <object class="GtkMessageDialog" id="AskDelLineEndDialog">
     <property name="can_focus">False</property>
-    <property name="border_width">6</property>
+    <property name="border_width">12</property>
     <property name="title" translatable="yes">Delete arrowhead ?</property>
+    <property name="resizable">False</property>
     <property name="type_hint">dialog</property>
     <property name="skip_taskbar_hint">True</property>
     <property name="message_type">question</property>
@@ -15,7 +16,7 @@
       <object class="GtkBox" id="messagedialog-vbox">
         <property name="can_focus">False</property>
         <property name="orientation">vertical</property>
-        <property name="spacing">2</property>
+        <property name="spacing">24</property>
         <child internal-child="action_area">
           <object class="GtkButtonBox" id="messagedialog-action_area">
             <property name="can_focus">False</property>