Merge branch 'fix/container-colore' into 'release'

Fix Container background color

Fix for issue: Canvas background was being set in templates, as a result, container's background wasn't perceived to be set.

See merge request theappsmith/internal-tools-client!523

app/client/src/utils/WidgetPropsUtils.tsx

@@ -51,6 +51,7 @@ const updateContainers = (dsl: ContainerWidgetProps<WidgetProps>) => {
     ) {
       const canvas = {
         ...dsl,
+        backgroundColor: "transparent",
         type: WidgetTypes.CANVAS_WIDGET,
         detachFromLayout: true,
         topRow: 0,