Fix overflowing mediacore iframe on mobile devices
Skinning fixes
Removed redundant divs
Modified page shadows a tiny bit
Make thumbnail extraction work cross-browser
Merge pull request #3740 from nicolaasmatthijs/issue-3740

Profile pictures are not transferred to unfollow dialog
(Issue 3749) Link to download URL for download instead of preview
Merge pull request #3690 from bp323/issue-3679

Fix overflowing mediacore iframe on mobile devices
Merge branch 'issue-3749' of https://github.com/mrvisser/3akai-ux into issue-3749
Merge branch 'master' into skinningIssues

Conflicts:
	admin/js/admin.util.js
Merge pull request #3734 from nicolaasmatthijs/skinningIssues

Skinning fixes
Fixed lhnavigation XSS issues
Merge pull request #3753 from nicolaasmatthijs/issue-3753

XSS issue on content profile page
(Release 6.3.0) Bump version
(Issue #3755) remove old stylesheets before adding new
Improved stylesheet removal documentation
Implement more advanced user management in the administration UI.

- CSV Import of users
- Create new user functionality
- New `User management` navigation item that shows a list of users in the current tenant
- When a user in the list is clicked it brings up the manageuser widget that allows editing the user's profile information, password and privileges
- Added new `User management` navigation item in the global admin panel as well that shows the users in the tenant
- Added new `Maintenance` navigation item in the global admin panel
- Added the ability to create a new global administrator (sort of, initial implementation, you can create a new user on the global administration tenant and then afterwards promote it to global admin by going into the settings for the user)
- Regenerate previews
    - Reprocess specific mime types
    - Reprocess failed content previews
    - Reprocess everything in date range
    - Reprocess for a specific user
    - Reprocess all items of specific content type
- Reindex search
Move around some translations to the main bundles
Follow up on user management review
Consistency updates for progress bars, tweaks to QUnit untranslated keys test, add failure handling in the changepic widget, rename maintenance to servermaintenance