Alerting Users In case None option is Selected and submit is clicked

[championpaddler]

I'm submitting a ... (check one with "x")

• bug report
• feature request

Current behavior:

Currently, Even if the user doesn't select any color for message pane or theme , success alert is thrown instead user should be notified to select one.

Would you like to work on the issue?

Please let us know if you can work on it or the issue should be assigned to someone else.

Yes

[ms10398]

It is a minor issue so try to fix it in one of your pending PRs @sk9331657