set default theme to moonlight

src/core/mainconfig.cpp

@@ -42,6 +42,8 @@ void MainConfig::init()
     m_widgetConfig->init(appJobj, userJobj);
 
     if (isVersionChanged()) {
+        doVersionSpecificOverride();
+
         // Update user config.
         writeToSettings();
     }
@@ -111,3 +113,9 @@ QString MainConfig::getVersion(const QJsonObject &p_jobj)
     const auto metadataObj = p_jobj.value(QStringLiteral("metadata")).toObject();
     return metadataObj.value(QStringLiteral("version")).toString();
 }
+
+void MainConfig::doVersionSpecificOverride()
+{
+    // In a new version, we may want to change one value by force.
+    m_coreConfig->setTheme(QStringLiteral("moonlight"));
+}

src/core/mainconfig.h

@@ -44,6 +44,8 @@ namespace vnotex
 
         QJsonObject saveMetaData() const;
 
+        void doVersionSpecificOverride();
+
         // Version of VNoteX.
         QString m_version;
 

src/data/core/vnotex.json

@@ -6,7 +6,7 @@
         "version" : "3.0.0-beta.3"
     },
     "core" : {
-        "theme" : "native",
+        "theme" : "moonlight",
         "locale" : "",
         "shortcuts" : {
             "FullScreen" : "F11",