Ui fixes

React Native provides a Platform abstraction which React does not
provide.

Use Maven in place of ant
Add --host parameter for jicofo
Add build for jitsi Meet

Revert "Force jquery-ui version to fix pb with beta version we can get with npm"

This reverts commit 35a8641e62.

cleanup: Remove default Chrome extension ID

Implement remote control support

It makes for a bad first-time experience for users, since the desktop sharing
button will be visible, but it will never work.

Also get rid of the now deprecated `desktopSharingChromeMethod` option.

Stick to clean-css version 3.x.

Starting version 4.x clean-css is split into two packages and we should depend on clean-css-cli for versions 4 and above. Tested it and we have currently some problem with it like fonts and images got referenced under css folder. So sticking version to 3.x for now.

iTunes Connect/TestFlight requires these now and is not satisfied with
empty values anymore.

This reverts commit b96ca538e4. While iPad
support is nice to have, we are not ready for a publish in App Store.
During the upload to iTunes Connect, a verification of the .ipa fails
because:

- app icons for iPad are missing:
  - 76x76 pixels in .png format for iOS versions >= 7.0,
  - 167x167 pixels in .png format for iOS versions supporting iPad Pro,
  - 152x152 pixels in .png format for iOS versions >= 7.0,
- orientations required for iPad Mutitasking are missing:
  - UIInterfaceOrientationPortraitUpsideDown.

Now that Apple have approved build 1.1.185 for release in the App Store,
the short app version needs to be incremented; otherwise, no new builds
can be uploaded to TestFlight and, respectively, for release in the App
Store.