fix(overhaul): UI and resolution bugs for Steam Deck (Gamescope)

Signed-off-by: Collecting <collecting@noreply.localhost>

src/citron/util/vram_overlay.h

@@ -15,6 +15,7 @@
 #include "citron/uisettings.h"
 
 class GMainWindow;
+class QSizeGrip;
 
 struct VramUsageData {
     u64 total_vram = 0;
@@ -33,7 +34,7 @@ class VramOverlay : public QWidget {
     Q_OBJECT
 
 public:
-    explicit VramOverlay(GMainWindow* parent);
+    explicit VramOverlay(QWidget* parent);
     ~VramOverlay() override;
 
     void SetVisible(bool visible);
@@ -63,6 +64,7 @@ private:
     void AddVramUsage(double percentage);
 
     GMainWindow* main_window;
+    QSizeGrip* size_grip;
     QTimer update_timer;
 
     // VRAM data