tdf#106946 Removed ability to resize Spellchecking-Options dialog

Change-Id: I89182eeb01f8639aa7d7af61f0fe99d96568b6e3
Reviewed-on: https://gerrit.libreoffice.org/42330Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

cui/uiconfig/ui/spelloptionsdialog.ui

 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.18.3 -->
+<!-- Generated with glade 3.20.0 -->
 <interface domain="cui">
   <requires lib="gtk+" version="3.0"/>
   <object class="GtkDialog" id="SpellOptionsDialog">
     <property name="can_focus">False</property>
     <property name="border_width">6</property>
     <property name="title" translatable="yes" context="spelloptionsdialog|SpellOptionsDialog">Options</property>
+    <property name="resizable">False</property>
     <property name="type_hint">dialog</property>
     <child internal-child="vbox">
       <object class="GtkBox" id="dialog-vbox1">
@@ -79,5 +80,8 @@
       <action-widget response="0">cancel</action-widget>
       <action-widget response="0">help</action-widget>
     </action-widgets>
+    <child>
+      <placeholder/>
+    </child>
   </object>
 </interface>