Merge the Leave and Forget room popups

src/gui/Pages/Chat/Banners/LeftBanner.qml

@@ -25,11 +25,13 @@ Banner {
     buttonCallbacks: ({
         forget: button => {
             window.makePopup(
-                "Popups/ForgetRoomPopup.qml",
+                "Popups/LeaveRoomPopup.qml",
                 {
-                    userId:   chat.userId,
-                    roomId:   chat.roomId,
-                    roomName: chat.roomInfo.display_name,
+                    userId:    chat.userId,
+                    roomId:    chat.roomId,
+                    roomName:  chat.roomInfo.display_name,
+                    inviterId: chat.roomInfo.inviter_id,
+                    left:      true,
                 },
                 obj => {
                     obj.onOk.connect(() => { button.loading = true })  // FIXME

src/gui/Pages/Chat/Chat.qml

@@ -59,19 +59,11 @@ Item {
                 roomId,
                 roomName: roomInfo.display_name,
                 inviterId: roomInfo.inviter_id,
+                left: roomInfo.left,
             },
         )
     }
 
-    HShortcut {
-        sequences: window.settings.Keys.Chat.forget
-        active: userInfo && userInfo.presence !== "offline"
-        onActivated: window.makePopup(
-            "Popups/ForgetRoomPopup.qml",
-            {userId, roomId, roomName: roomInfo.display_name},
-        )
-    }
-
     Timer {
         interval: 300
         running: ! ready