Fix minor stylistic issues on the nheko theme

include/LeaveRoomDialog.h

@@ -10,6 +10,9 @@ class LeaveRoomDialog : public QFrame
 public:
         explicit LeaveRoomDialog(QWidget *parent = nullptr);
 
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
 signals:
         void closing(bool isLeaving);
 

include/LoginPage.h

@@ -42,6 +42,9 @@ public:
 signals:
         void backButtonClicked();
 
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
 public slots:
         // Displays errors produced during the login.
         void loginError(QString error_message);

include/LogoutDialog.h

@@ -27,6 +27,9 @@ class LogoutDialog : public QFrame
 public:
         explicit LogoutDialog(QWidget *parent = nullptr);
 
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
 signals:
         void closing(bool isLoggingOut);
 

include/RegisterPage.h

@@ -35,6 +35,9 @@ public:
         RegisterPage(QSharedPointer<MatrixClient> client, QWidget *parent = 0);
         ~RegisterPage();
 
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
 signals:
         void backButtonClicked();
 

include/UserSettingsPage.h

@@ -65,6 +65,7 @@ public:
 protected:
         void showEvent(QShowEvent *event) override;
         void resizeEvent(QResizeEvent *event) override;
+	void paintEvent(QPaintEvent *event) override;
 
 signals:
         void moveBack();

include/WelcomePage.h

@@ -28,6 +28,9 @@ class WelcomePage : public QWidget
 public:
         explicit WelcomePage(QWidget *parent = 0);
 
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
 signals:
         // Notify that the user wants to login in.
         void userLogin();