Add requestPaint formerly in DrawView::execute

src/Mod/TechDraw/App/DrawViewSpreadsheet.cpp

@@ -113,7 +113,8 @@ App::DocumentObjectExecReturn *DrawViewSpreadsheet::execute(void)
         return new App::DocumentObjectExecReturn("Empty cell value");
 
     Symbol.setValue(getSheetImage());
-
+
+    requestPaint();
     return TechDraw::DrawView::execute();
 }