qt: Let OptionsDialog emit a signal if appearance gets changed

Author: xdustinface

src/qt/optionsdialog.cpp

@@ -160,6 +160,7 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
 
     connect(appearance, &AppearanceWidget::appearanceChanged, [=](){
         updateWidth();
+        Q_EMIT appearanceChanged();
     });
 
     updatePrivateSendVisibility();

src/qt/optionsdialog.h

@@ -67,6 +67,7 @@ private Q_SLOTS:
     void updateWidth();
 
 Q_SIGNALS:
+    void appearanceChanged();
     void proxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPort);
 
 private: