Update design of forgot_password and change_password forms

Fix redirect to stream, make labels lower-case

Fix cuke
Update JQuery source to jquery.com
Merge pull request #4707 from goobertron/improved_new_password

New reset password form

Conflicts:
	Changelog.md
move PasswordsController specs to the new appropiate location
Merge pull request #4765 from goobertron/jquery_source

Update JQuery source to jquery.com

Conflicts:
	Changelog.md
Issue #4767: Removed space that is inserted following the insertion of a mention
Moved mentionsInput.js from vendor/assets to lib/assets

The jquery.mentionsInput plugin upstream is no longer maintained.
Merge pull request #4775 from dash-rai/move-mentions-input-plugin

Moved jquery.mentionsInput plugin