Lots of updates:

1. Scrolling and click to set the cursor works.
2. GUI now uses Brass Mono as the font.
3. A lot of stability and other updates.

GUIFrontend.h

@@ -11,22 +11,27 @@
 struct SDL_Window;
 typedef void *SDL_GLContext;
 
-class GUIFrontend : public Frontend {
+class GUIFrontend final : public Frontend {
 public:
     GUIFrontend() = default;
+
     ~GUIFrontend() override = default;
 
     bool Init(Editor &ed) override;
+
     void Step(Editor &ed, bool &running) override;
+
     void Shutdown() override;
 
 private:
+    bool LoadGuiFont_(const char *path, float size_px);
+
     GUIInputHandler input_{};
     GUIRenderer renderer_{};
-    SDL_Window *window_ = nullptr;
+    SDL_Window *window_   = nullptr;
     SDL_GLContext gl_ctx_ = nullptr;
-    int width_ = 1280;
-    int height_ = 800;
+    int width_            = 1280;
+    int height_           = 800;
 };
 
 #endif // KTE_GUI_FRONTEND_H