Fix left rooms appearing as joined rooms

TODO.md

@@ -46,7 +46,6 @@
   - Message order isn't preserved when sending a first message in a E2E
     room, then while keys are being shared sending one with another account,
     then sending one with the first account again
-  - Left rooms reappear as joined rooms
 
   - If account not in config anymore, discard ui state last page on startup
   - Do something when access token is invalid

src/qml/Chat/Chat.qml

@@ -26,20 +26,6 @@ Item {
     readonly property alias roomPane: roomPane
 
 
-    onRoomInfoChanged: {
-        if (roomInfo.left) {
-            // If left, the room will most likely be gone on client restart.
-            // Try to switch back to the previous page.
-            if (pageLoader.showPrevious()) return
-
-            // If there wasn't any previous page, show default page.
-            window.uiState.page           = "Pages/Default.qml"
-            window.uiState.pageProperties = {}
-            window.uiStateChanged()
-        }
-    }
-
-
     HLoader {
         id: loader
         anchors.rightMargin: roomPane.visibleSize

src/qml/Chat/ChatPage.qml

@@ -52,15 +52,16 @@ HPage {
         Layout.fillWidth: true
     }
 
+    LeftBanner {
+        id: leftBanner
+        visible: chat.roomInfo.left
+        Layout.fillWidth: true
+    }
+
     Composer {
         id: composer
         visible: ! chat.roomInfo.left &&
                  ! chat.roomInfo.inviter_id
     }
 
-    LeftBanner {
-        id: leftBanner
-        visible: chat.roomInfo.left
-        Layout.fillWidth: true
-    }
 }