use default expire date only for link shares

allow admin to enforce passwords for public link shares

Fix drag and drop in IE8

Files app navigation sidebar

For some reason IE8 didn't like the sort function, so using the one from
underscore instead.

- fixed upload and storage statistics
- fixed infinite scroll to use the correct contain for scroll detection
- fixed unit test that sometimes fail for rename case
- controls are now sticky again
- fixed selection overlay to be aligned with the table
- fixed "select all" checkbox that had id conflicts
- fixed public page
- fixed global actions permissions detection
- fix when URL contains an invalid view id
- viewer mode now hides the sidebar (ex: text editor)
- added unit tests for trashbin
- clean up storage info in template (most is retrieved via ajax call now)

- FileList is now an instantiable class
- FileActions is now in namespace
- added App class for trashbin app
- moved trashbin overrides into classes extending FileList
- replaced many static calls with "this." or "self." to make the classes
  reusable/extendable
- new URL parameter "view" to specify which view is shown, for example
  "files" or "trashbin"
- added OC.Util.History utility class in core for handling history
- moved URL handling/routing to OCA.Files.App
- popstate will correctly update the current view and notify the view of
  the URL change so it can update the current dir
- added JS unitt tests for the trashbin app
- fixed public app to work with the new namespaces

- added new OCA.Files namespace for files classes
- the sidebar can now switch between views/containers
- the trashbin renders in its own container but currently doesn't work
  due to overrides
- added app.js as entry point for JS code (ideally all other files should
  only contain classes and not trigger anything)

Apps can now register navigation items into the sidebar of the files app.
For every sidebar item there is a container.
The container's content is rendered based on the script name given at
registration time.

- Added links to trashbin and shared dir
- Moved "WebDAV" settings block to the app nav's settings section
- Added sidebar support in trashbin app as well

[regression] Fixed trashbin to use correct class

It seems that \OC_Filesystemview has been removed.
Now using the correct class \OC\Files\View()

Vertically align public layout to better fit small mobile screens

rename URL-fields to Host for SFTP/FTP and SMB external Storage backends

Small cleanup and language detection for apps

fix typo encryption

Added ground work for OC.Share unit tests

Sharing ux improvements

fix oc dialog because the body isn't 100% x 100% in dimensions anymore

avoid row resize on filename edit

Sets row height to avoid resize when name is edited

use fetch method instead of fetchRow because fetchRow is only an owncloud internal alias that exists purely for compability

provide a way to detect the language that is being used (e.g. for clientside javascript language selection

We do not support updates from 4.5 > 7.0 or even 3.0 > 7.0

PHPDoc Improvements

Add tests for other types that PHP might cast

Addition to https://github.com/owncloud/core/pull/8572