A couple of smaller fixes;

- Modifier Panel, name label for "Virtual" modifiers was too short
- On extrude Bones, "soft distance" now is always set based on length
  of the bone (also on CTRL+click, also when Envelope drawmode is not set)
- Added undo-push for "Apply Bone Envelopees to VertexGroup" in WeightPaint.
- Menu-buttons in floating panels sometimes gave drawing error
- InfoWindow buttons were always allocated & drawn, even when window was
  zero sized... waste of cpu, tsk!

source/blender/src/interface.c

@@ -1210,7 +1210,8 @@ static int ui_do_but_MENU(uiBut *but)
 	
 	but->flag &= ~UI_SELECT;
 	ui_check_but(but);
-	ui_draw_but(but);
+	/* no draw of button now, for floating panels the matrix now is invalid...
+	   the button still is active, and will be redrawn in main loop to de-activate it */
 	
 	uibut_do_func(but);