Fixed issue #426 (#476)

* Fixed issue #426

This might be a patch for the problem, but it works

* Now less redraws, but still working

operators/add_workplane.py

@@ -137,6 +137,7 @@ def main(self, context: Context):
 
         self.target = sse.add_workplane(origin, nm)
         ignore_hover(self.target)
+        context.area.tag_redraw() # Force re-draw of UI (Blender doesn't update after tool usage)
         return True