Disable member power level control when offline

TODO.md

@@ -3,7 +3,6 @@
 - global presence control
 - power level control keyboard focus
 - idlemanager: what if setPresence call fails due to network?
-- disable member power level change control when offline
 - fix power level control button layout when apply button is loading
 
 - joining new DM → not loading past events the first time?

src/gui/Pages/Chat/RoomPane/MemberView/MemberView.qml

@@ -39,6 +39,7 @@ HColumnLayout {
                         ownPowerLevel:
                             Qt.binding(() => chat.roomInfo.own_power_level),
                         canSetPowerLevels: Qt.binding(() =>
+                            chat.userInfo.presence !== "offline" &&
                             chat.roomInfo.can_set_power_levels
                         ),
                         member: model,