[NEW] Add Reply feature

[NEW] Shows file list from a room

Merge custom actions if any (ones other than the defaults) to message actions and remove test action

[CHORE] Realm Stetho - Increase table view data limit

[DOCS] Update ISSUE_TEMPLATE.md

[DOCS] Update CONTRIBUTING.md

[CHORE] Increment release & build number: 1.0.21 - 41

Clear Realm on asynchronous thread and also clear cookies

Multiple minor issues fixes