Implement theme pickers + importing

YACReader/options_dialog.cpp

@@ -210,6 +210,7 @@ OptionsDialog::OptionsDialog(QWidget *parent)
 
     auto *pageAppearance = new AppearanceTabWidget(
             ThemeManager::instance().getAppearanceConfiguration(),
+            ThemeManager::instance().getRepository(),
             []() { return ThemeManager::instance().getCurrentTheme().sourceJson; },
             [](const QJsonObject &json) { ThemeManager::instance().setTheme(makeTheme(json)); },
             this);