* Fix placement of new messages separator
* Ignore your own posts when determining start of new messages
* Cache lastViewedAt in ChannelPostList until switching channels
* Increase padding around DateHeader & NewMessagesDivider
* Improve styling of new messages divider line
* Use async await for ChannelDrawerList.onSelectChannel
* Convert DateHeader to functional component
* modal options and channel long press
* PureComponent optimization (#183)
* Bug fix when leaving the current channel
* Rebased with new navigation
* Add disabled drawer to unit test
* re-organize modal up in the stack and controlled by redux
* renaming modalOptions to optionsModal
* Moved ChannelDrawer into its own scene
* Moved RightSideMenu to a separate route
* Moved title back above scenes
* Moved right side menu into a separate scene
* Reorganized navigation so that it centers around ChannelView when logged in
* Stopped using NavigationExperimental to manage drawers
* Fixed copyright date
* Added unit tests for navigation drawers
* Renamed RightSideMenu to RightMenuDrawer
* Removed unnecessary ChannelDrawer style
