Unnecessary re-renders removed (#570)

* shouldComponentUpdate

* Rooms list shouldcomponentupdate

* RoomView shouldComponentUpdate

* Messagebox and Message shouldComponentUpdate

* EmojiPicker shouldComponentUpdate

* RoomActions shouldComponentUpdate

* Room info shouldComponentUpdate

* Update RNN

* Use only one Flatlist if none group filter is selected

* Update fix

* shouldComponentUpdate

* Bug fixes

* ListView changes

* Bug fix

* render list bug fix

* Changes on public channels

* - RoomView saga leak removed
- Join room e2e tests added

* Rest versions

* Method call versions

* Min RocketChat version alert