increase defaultroster window width. Fixes #6967

data/gui/roster_window.ui

@@ -3,11 +3,11 @@
   <requires lib="gtk+" version="2.16"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkWindow" id="roster_window">
-    <property name="width_request">85</property>
+    <property name="width_request">250</property>
     <property name="height_request">200</property>
     <property name="title" translatable="yes">Gajim</property>
     <property name="role">roster</property>
-    <property name="default_width">200</property>
+    <property name="default_width">250</property>
     <property name="default_height">400</property>
     <accel-groups>
       <group name="accelgroup1"/>