Increased minimum size for disconnect window

ubl-settings-system-domain.glade

@@ -5,10 +5,10 @@
   <!-- interface-css-provider-path ubl-settings-system.css -->
   <object class="GtkApplicationWindow" id="MainWindow">
     <property name="width-request">450</property>
-    <property name="height-request">300</property>
+    <property name="height-request">240</property>
     <property name="can-focus">False</property>
     <property name="modal">True</property>
-    <property name="icon-name">com.ublinux.ubl-settings-repomanager</property>
+    <property name="icon-name">com.ublinux.ubl-settings-system</property>
     <child>
       <object class="GtkBox">
         <property name="visible">True</property>