Send reaction view quick react and picker

[BillCarsonFr]

Fixes #114
Fixes #116

Adding Ability to send reaction via quick react and picker + increment existing

Known Limitations:

• Can only add reaction (not possible to undo/remove existing)
• Quick reaction is only adding (e.g. if you disagree a previously agreed event, app will not undo old and add new)
• Not using the new send_relation API as not available (code created but not tested), uses the regular send event
• No Optimistic update. Intermediate states e.g. currently sending reaction not handled perfectly (might experience delay) -> Optimistic send in phase 2

• fix / Error when to many reactions in cells (more than placeholders -8-)
• fix / DefaultTimeline quick map access was not shifted when items inserted at given index (reaction was added to wrong message)

[ganfra]

LGTM