[Themes] Added themes selector to context menu

src/shared/Modules/SkywardHubStrings.h

@@ -38,6 +38,8 @@ static const QString defaultPrefabsFolder =
 static const QString defaultConfigurationFileName = "default.xml";
 static const QString defaultConfigurationIconPath =
     defaultConfigurationFolder + "/" + "defaultConfigIcon.svg";
+static const QString defaultThemesFolderPath =
+    defaultConfigurationFolder + "/" + "Themes";
 
 // Xml Tags Name
 static const QString skywardHubInitFileTag             = "LoadOnLaunch";