resized documentation windo

ubl-settings-manager.glade

@@ -151,7 +151,6 @@
     <property name="can-focus">False</property>
     <property name="resizable">False</property>
     <property name="default-width">450</property>
-    <property name="default-height">250</property>
     <property name="icon-name">dialog-question-symbolic</property>
     <child>
       <object class="GtkBox">