Room input improvements (#1502)

Room input improvements (#1502)

* prevent context menu when editing message

* send sticker body (#1479)

* update emojiboard search text reaction input label

* stop generating upload image thumbnail (#1475)

* maintain upload order

* Fix message options spinner variant

* add markdown toggle in editor toolbar

* fix heading toggle icon update with cursor move

* add hotkeys for heading

* change editor markdown btn style

* use Ctrl + Enter to send message (#1470)

* fix reaction tooltip word-break

* add shift in editor hokeys with number

* stop parsing markdown in link