Hide item form query both when marked for deletion and when deleting (+1 squashed commits)

Squashed commits:

[5e01dc48] Added new syncstates for messages to be deleted
Added observer for messages marked for deletion
Added error handling for messages that could not be deleted

[NEW] Display Keyboard when launching dialog

[RELEASE] Increment build version: 1.0.22 - 43

[NEW] Add Quote a message action

Fallback room type to group ("p") if admin adds a custom room type

Update CONTRIBUTING.md

Add upload any file action to attachments

[PROJECT] Removed un-needed project dependencies

[DOCS] Updated README with deployment/debugging instructions

[PROJECT] gradle(globally declare library) changes

[FIX] Null Pointer Exception on Sliding Pane

[RELEASE] Increment build version to 1.0.22 (42)

[NEW] Add Reply feature

[NEW] Shows file list from a room