fix display name required dialog

Fixes issue of method 'setTooltip'

Add specific color for read-only input

Fixes placeholder color

Fix some visual bugs

feedback style variables

fix(chat): Issue with position of chat messages

An error was discovered and fixed by GitHub user blackneck in
jitsi/jitsi-meet PR #1017. The faulty source code was a piece of
duplication though. Remove the source code duplication there to reduce
the risks of bugs.

Fixes issue of method 'setTooltip' in modules/UI/util/UIUtil.js: Excluded 'Uncaught TypeError':
```
UIUtil.js:134 Uncaught TypeError: Cannot read property 'setAttribute' of null
```

Fix shortcut dialog toggling

jitsi/lib-jitsi-meet#66b601e disabled the execution of Temasys'
adapter.screenshare.js on browsers on which we don't use Temasys such as
React Native. Henceforth, no Temasys workarounds are necessary on React
Native.

Trivial fix of capital letters.

Some contact list styling adjustments

Adds toolbar splitter button

Add possibilty to set password via return key

Initialise the invite dialog on user action

Fixes cannot read property of undefined if there is no local video.

Fixes cdn issue with remove password link.

Fullscreen feature fixes

Calculates quality based on the resolution and upload.

Adds an id to etherpad iframe.

Uses some ES6 syntax. Also removes inputHeight key for resolution as it makes no sence to have dictionary with one key. Removes some code duplication. Makes code consistent: method params for updateLocalStats and updateRemoteStats.

Add interfaceConfig option for disabling ringing