New icons (#643)

* New Icons

* Remove unused assets

* Change send icon

* Layout tweaks

* Refactor Status

* Styles changed

* User layout fix

* Separator layout changes

* Sidebar status layout fix

* Fix Message.onLongPress issue

* Fix code markdown
Closes https://github.com/RocketChat/Rocket.Chat.ReactNative/issues/625

* Status lint

* Fix tests

* Navigation debounce

* RoomActions icons

* Space between components

* Group text

* Update tests