that the flag FLAG_ACTIVITY_SINGLE_TOP is set to MainActivity when
launching we keep always a single instance of it avoiding it to leak

Hide channel icon when changing server, preventing RoomToolbar from inheriting last seen channel's icon.

Avoids error in case there's no more servers logged in but the app was caught in the middle of connection retry

Logout method does not remove all servers anymore, but instead it removes solely the current hostname which the client is connected

Add remove hostname method to cache; add possibility to set null to selected server, also avoiding a possible NPE

[FIX] Set app to always use the Push Gateway

Update okhttp version from 3.8.0 to 3.9.0

the issue:
https://fabric.io/rocketchat3/android/apps/chat.rocket.android/issues/59aabd5fbe077a4dcc019902
as refereced by:
https://github.com/square/okhttp/issues/3308

[NEW] Action to upload any type of file

[NEW] Support multi-server

[FIX] Fix loading vector drawables from resources on api < 21

https://fabric.io/rocketchat3/android/apps/chat.rocket.android/issues/59b3f29bbe077a4dcc5c5fcd

[CHORE] Bump app version to 1.0.18 (36)

Merge branch 'chore/bump_version_2' of github.com:RocketChat/Rocket.Chat.Android into chore/bump_version_2

[FIX] Re-enable navigation icon animation and its touch listener on the main (entry) screen.

[FIX] Spotlight results