matrix-react-sdk

084a933d - Implement MessageComposerStore to persist composer state across room switching

Implement MessageComposerStore to persist composer state across room switching This behaviour was present in the old composer but implemented using local storage. This is unecessary as we don't really care about our drafts across clients, the important thing is that our draft is kept when switching rooms. As a bonus, ifnore vertical arrow key presses when a modifier key is pressed so that the room switching keys (alt + up/down arrow) don't also cause history browsing (or autocomplete browsing).