Unset the transient parent on separate chat windows

relates to #1168

resources/qml/RoomList.qml

@@ -74,7 +74,10 @@ Page {
                 property var room: null
                 property var roomPreview: null
 
-                Component.onCompleted: MainWindow.addPerRoomWindow(room.roomId || roomPreview.roomid, roomWindowW)
+                Component.onCompleted: {
+                    MainWindow.addPerRoomWindow(room.roomId || roomPreview.roomid, roomWindowW);
+                    Nheko.setTransientParent(roomWindowW, null);
+                }
                 Component.onDestruction: MainWindow.removePerRoomWindow(room.roomId || roomPreview.roomid, roomWindowW)
 
                 height: 650
@@ -84,8 +87,7 @@ Page {
                 palette: Nheko.colors
                 color: Nheko.colors.window
                 title: room.plainRoomName
-                modality: Qt.NonModal
-                flags: Qt.Window | Qt.WindowCloseButtonHint | Qt.WindowTitleHint
+                //flags: Qt.Window | Qt.WindowCloseButtonHint | Qt.WindowTitleHint
 
                 Shortcut {
                     sequence: StandardKey.Cancel

src/ui/NhekoGlobalObject.cpp

@@ -128,6 +128,13 @@ Nheko::logout() const
     ChatPage::instance()->initiateLogout();
 }
 
+void
+Nheko::setTransientParent(QWindow *window, QWindow *parentWindow) const
+{
+    if (window)
+        window->setTransientParent(parentWindow);
+}
+
 void
 Nheko::createRoom(QString name, QString topic, QString aliasLocalpart, bool isEncrypted, int preset)
 {

src/ui/NhekoGlobalObject.h

@@ -8,6 +8,7 @@
 #include <QFontDatabase>
 #include <QObject>
 #include <QPalette>
+#include <QWindow>
 
 #include "AliasEditModel.h"
 #include "PowerlevelsEditModels.h"
@@ -65,6 +66,7 @@ public:
     {
         return new AliasEditingModel(room_id_.toStdString());
     }
+    Q_INVOKABLE void setTransientParent(QWindow *window, QWindow *parentWindow) const;
 
 public slots:
     void updateUserProfile();