Remove final which breaks type registration

src/Clipboard.h

@@ -8,7 +8,7 @@
 #include <QQmlEngine>
 #include <QString>
 
-class Clipboard final : public QObject
+class Clipboard : public QObject
 {
     Q_OBJECT
     QML_ELEMENT

src/encryption/SelfVerificationStatus.h

@@ -7,7 +7,7 @@
 #include <QObject>
 #include <QQmlEngine>
 
-class SelfVerificationStatus final : public QObject
+class SelfVerificationStatus : public QObject
 {
     Q_OBJECT
 

src/ui/NhekoGlobalObject.h

@@ -16,7 +16,7 @@
 #include "Theme.h"
 #include "UserProfile.h"
 
-class Nheko final : public QObject
+class Nheko : public QObject
 {
     Q_OBJECT