Style Message Config & Forms

Summary:
* styles data provider config & forms
* fixes T325

Test Plan:
* load messages config view
* resize browser for data-provider-card responsive views
* click enable/disable
* click configure
* resize browser to test form fields responsive views
    * please test each provider form

Reviewers: rjmackay, shadowhand

Reviewed By: shadowhand

Subscribers: dkobia

Maniphest Tasks: T325

Differential Revision: https://phabricator.ushahidi.com/D178