macosx: make sure that the messages panel is updated nicely, when on screen

modules/gui/macosx/intf.m

@@ -2317,6 +2317,8 @@ end:
 {
     if( [o_notification object] == o_msgs_panel )
     {
+        [self updateMessageArray];
+
         id o_msg;
         NSEnumerator * o_enum;
 
@@ -2335,6 +2337,12 @@ end:
     }
 }
 
+- (void)windowDidUpdate:(NSNotification *)o_notification
+{
+    if( [o_notification object] == o_msgs_panel )
+        [self updateMessageArray];
+}
+
 - (void)updateMessageArray
 {
     int i_start, i_stop;