Emoji drawer for reactions on mobile

When reactions to a message, the focus on the search input displays the keyboard (taking all the free space)

related to #276 (closed)

Maybe remove this search input completely? (or at least for mobile users)

Set the picker almost fullscreen (with increased font size?) and keep the current behavior

added Support label

mentioned in merge request !139 (merged)

mentioned in commit 690b38e1

closed via merge request !139 (merged)