Wizards: increase width of dialog

We do not want scrollbars.

Change-Id: I16454d6ce941d7a9d5e4aadfc92f006b0b0db792
Reviewed-by: Alessandro Portale <alessandro.portale@nokia.com>

src/plugins/coreplugin/dialogs/newdialog.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>848</width>
+    <width>880</width>
     <height>520</height>
    </rect>
   </property>