* fixes #12326 - the settings menu is closed now, because the event is executed

Use local time instead. http://momentjs.com/

Use correct time format in WebUI

This reverts commit 8279dde9.

Update how the time shows in WebUI.

My first PR to core, woha. :)

Doing this in the PHP code is not the right approach for multiple reasons:

1. A bug in the PHP code prevents them from being added to the response.
2. They are only added when something is served via PHP and not in other cases (that makes for example the newest IE UXSS which is not yet patched by Microsoft exploitable on ownCloud)
3. Some headers such as the Strict-Transport-Security might require custom modifications by administrators. This was not possible before and lead to buggy situations.

This pull request moves those headers out of the PHP code and adds a security check to the admin settings performed via JS.

This function is often used in a wrong and potential dangerous way... Thus we should escape the URL per default and offer developers to disable the automatic escaping via an option parameter if they really want that behaviour.

Might break some things, however, those things are then easy to fix and we really have a ton of bugs caused by this...

Fixes https://github.com/owncloud/core/issues/14228

Makes my IDE happier.

* options for timeout in seconds and if it contains HTML
* if timeout is 0 it will show the message permanently
* removes the notification after a given (default: 5 seconds) timeframe
* based on work by @brantje
* provide JS unit tests for notifications

use more flexible return type

check array with !empty instead of count

For apps that support async translation loading, a new function
OC.L10N.load() can be used to asynchronously load the translations
for a given app.

Added namespaces so that JSDoc can find them.
Fixed a few warnings.
Improved some comments.

Moved search result type translations to search.js

Load JS translations earlier

Translations need to be loaded earlier to make sure that some JS files
like search.js get access to translations at this time.

This requires the template initialization to be moved to after session
initialization, because only after the session we have access to the
current language.

Added addTranslations and fixed de.js file

Fixed de.js to use OC.L10N.register() and use to correct expected
format.

Added JS unit tests for OC.L10N class

Include translations JS script for all apps

- Added setup checks in JavaScript
- Moved isWebDAVWorking to JS using SetupChecks
- Moved internet connection checks to an ajax call that goes through the
  server

Path will only be shown if in subdirectory, not in root.