Allow right-clicking on a room without selecting it

Same idea as the fix I did for spaces, we introduce a new signal called
selected instead of using ItemDelegate's button signals.

src/qml/ChooseRoomDialog.qml

@@ -31,7 +31,7 @@ Kirigami.ScrollablePage {
         delegate: RoomDelegate {
             id: roomDelegate
             filterText: ""
-            onClicked: {
+            onSelected: {
                 root.chosen(roomDelegate.currentRoom.id)
             }
             connection: root.connection

src/qml/QuickSwitcher.qml

@@ -94,7 +94,7 @@ QQC2.Dialog {
 
                 connection: root.connection
 
-                onClicked: {
+                onSelected: {
                     RoomManager.enterRoom(currentRoom);
                     root.close()
                 }

src/qml/RoomDelegate.qml

@@ -31,13 +31,21 @@ Delegates.RoundedItemDelegate {
 
     readonly property bool hasNotifications: notificationCount > 0
 
+    signal selected()
+
     Accessible.name: root.displayName
 
     onPressAndHold: createRoomListContextMenu()
 
     TapHandler {
-        acceptedButtons: Qt.RightButton
+        acceptedButtons: Qt.RightButton | Qt.LeftButton
-        onTapped: createRoomListContextMenu()
+        onTapped: (eventPoint, button) => {
+            if (button === Qt.RightButton) {
+                root.createRoomListContextMenu();
+            } else {
+                root.selected();
+            }
+        }
     }
 
     contentItem: RowLayout {

src/qml/RoomListPage.qml

@@ -278,7 +278,7 @@ Kirigami.Page {
 
                         visible: categoryVisible || filterText.length > 0 || Config.mergeRoomList
 
-                        onClicked: RoomManager.enterRoom(currentRoom)
+                        onSelected: RoomManager.enterRoom(currentRoom)
 
                         Keys.onEnterPressed: RoomManager.enterRoom(currentRoom)
                         Keys.onReturnPressed: RoomManager.enterRoom(currentRoom)