Previously would not open the client if the window was minimized.
Added the same popup fix for mentions

deck editor is tab, replay viewer is tab, deck editor shown by default, cache window geometry between sessions, 'open this deck in deck editor' open in game

context menu for a message sender's name in chat; also display the user level icon next to the name; minor consistency and type-safety changes

moderators can override game restrictions and kick players when spectating; game host privileges shift when host leaves