[IMPROVED] Added re-Captcha to Login Page

* Enable re-captcha to use it
* Disables the mini-login box in header
* Requires re-Captcha to be setup in Admin Panel

Fixes #1400 once merged.
[ADDED] re-Captha admin options
[ADDED] Default re-Captcha HTML to mobile
[UPDATE] CSRF to Mobile template
Merge pull request #1404 from TheSerapher/issue-1400

[IMPROVED] Added re-Captcha to Login Page