[LOW] Global/Course Feed. Assignment details. Alert error is not displayed, if user second sent empty post.

[staeron]

STEPS:

• Navigate to http://zerebral.indevelopment.us/

• Field for comment text leave empty and try to double click on "Post message".

  User should see alert error:

Oops, it seems we have errors here: Please write comment text

RESULT: After the second attempt of sending empty post, alert error is not displayed. User can see only:

Oops, it seems we have errors here:

See screenshot:

[deespater]

@sergei-weavora please check

[staeron]

Done