Center user info dialog on the screen

resources/qml/UserProfile.qml

@@ -10,6 +10,8 @@ ApplicationWindow {
 
     property var profile
 
+    x: MainWindow.x + (MainWindow.width / 2) - (width / 2)
+    y: MainWindow.y + (MainWindow.height / 2) - (height / 2)
     height: 650
     width: 420
     minimumHeight: 420

src/MainWindow.h

@@ -61,10 +61,15 @@ class MainWindow : public QMainWindow
 {
         Q_OBJECT
 
+        Q_PROPERTY(int x READ x)
+        Q_PROPERTY(int y READ y)
+        Q_PROPERTY(int width READ width)
+        Q_PROPERTY(int height READ height)
+
 public:
         explicit MainWindow(QWidget *parent = nullptr);
 
-        static MainWindow *instance() { return instance_; };
+        static MainWindow *instance() { return instance_; }
         void saveCurrentWindowSize();
 
         void openLeaveRoomDialog(const QString &room_id);

src/timeline/TimelineViewManager.cpp

@@ -128,6 +128,10 @@ TimelineViewManager::TimelineViewManager(CallManager *callManager, ChatPage *par
           "UserProfile needs to be instantiated on the C++ side");
 
         static auto self = this;
+        qmlRegisterSingletonType<MainWindow>(
+                    "im.nheko", 1, 0, "MainWindow", [](QQmlEngine *, QJSEngine *) -> QObject * {
+            return MainWindow::instance();
+        });
         qmlRegisterSingletonType<TimelineViewManager>(
           "im.nheko", 1, 0, "TimelineManager", [](QQmlEngine *, QJSEngine *) -> QObject * {
                   return self;