Turn frontpage shortcut into an app component

- Turn frontpage shortcut into an App component. Add tests and full
  documentation.

- Overridden implementations for tahoe, diaspora, mediawiki shortcuts to handle
  special cases. Special handling for ikiwiki.

- Extend App API for removing and retrieving a component.

- Add clients information into shortcuts to avoid hacks when presenting
  shortcuts to Mobile devices via API.

- Fixed unnecessary stripping and adding of '/' when setting home page redirect
  URLs. This fixes problem with setting Cockpit as home page.

- Replaced the use of term 'app' in favor of 'shortcut' as the term when setting
  frontpage shortcuts as home page.

- JSXC shortcut does not require login.

- Don't show shadowsocks for anonymous users.

- Simplify showing selected shortcut details.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
2 jobs for menu-component in 13 minutes and 41 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #191632
run-unit-tests

00:05:58

26.84%
 
  Package
passed #191633
build-debian-package

00:07:43