ui.backend.gtk: make it so configure-im is called after realize (#1307)

gtk_im_context_set_client_window must be called with a realized window
otherwise IM won't work,
http://lists.maemo.org/pipermail//maemo-developers/2006-January/002337.html

basis/ui/backend/gtk/gtk-docs.factor

@@ -0,0 +1,7 @@
+USING: gtk.ffi help.markup help.syntax ;
+IN: ui.backend.gtk
+
+HELP: configure-im
+{ $values { "win" GtkWindow } { "im" GtkIMContext } }
+{ $description "Configures the input methods of the window. Must only be run after the window hasbeen realized." }
+{ $see-also gtk_widget_realize } ;

basis/ui/backend/gtk/gtk.factor

@@ -467,11 +467,11 @@ M:: gtk-ui-backend (open-window) ( world -- )
     gtk_window_set_wmclass
 
     world configure-gl
+    win gtk_widget_realize
+
     win im configure-im
     win connect-user-input-signals
     win connect-win-state-signals
-
-    win gtk_widget_realize
     win world window-controls>> configure-window-controls
 
     win gtk_widget_show_all ;