Converts em to px values for styles in Files.
Cleans up Core apps for relative(em) to absolute(px) styles.
All Core Styles from em->px, apart from styles.css
#6051 [ux][files] Move File Spinner

Added spinner to file icon when moving to new folder or out of folder.

Commit is related to #6051
Fixed indention.

As per @kabum request, indention on line 694 has been fixed.
change mail address by pressing enter - fixes #6179
fix typo
Disabled internet checking as mentioned when in proxy mode
fix upload button layout
remove extra upload controls
modify js to move upload wrapper, modify css to match core values
Added SVG fallback to apps settings popup

This fix issue of calendar app with IE8, see issue report for details:
https://github.com/owncloud/calendar/issues/291
Useless else removed

As suggested by @PVince81 : https://github.com/owncloud/core/pull/6721#issuecomment-32289922
Merge branch 'master' into files-em-to-px

Conflicts:
	apps/files/css/files.css
error handling in case a requested app doesn't exists
properly handle app activation for unit testing
change em to px
Fixes Trashbin and Files Style Conflicts, more em to px conversions post rebase
Merge branch 'master' into core-em-to-px

Conflicts:
	apps/files_sharing/css/public.css
	apps/user_ldap/css/settings.css
	core/css/multiselect.css
	core/css/share.css
Fixes typo in versions.css