User Settings Validation issues
- Validate username
- Validate email
- Read-only username field format change
- Do not show Status field when adding user

Fix for https://github.com/Rise-Vision/common-header/issues/194, https://github.com/Rise-Vision/common-header/issues/219,
https://github.com/Rise-Vision/common-header/issues/220, https://github.com/Rise-Vision/common-header/issues/172
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dist/js/common-header.js
	src/js/controllers/ctr-user-settings-modal.js
Merge pull request #246 from settinghead/master

User settings validation issues