launcher: fix light mode, group settings into resizable sections

src/launcher/include/launcherTheme.h

@@ -0,0 +1,12 @@
+#ifndef LAUNCHER_THEME_H
+#define LAUNCHER_THEME_H
+
+class QApplication;
+
+namespace LauncherTheme {
+
+void Initialize(QApplication& application);
+
+} // namespace LauncherTheme
+
+#endif // LAUNCHER_THEME_H