Implement Message's actions for mobile devices, fixes T466

Summary: - Add .js- selector used for desktop devices so it trigger the actions

Test Plan:
 - Go to #messages
 - Resize browser window to a small size
 - Click on actions
 - See a dropdown appear
 - Click on an item to perform an action

Reviewers: rjmackay, shadowhand

Reviewed By: shadowhand

Subscribers: srutto, seth, lkamau

Maniphest Tasks: T466

Differential Revision: https://phabricator.ushahidi.com/D230