Fix glabels-qt bugged theme

overlay.nix

@@ -68,6 +68,28 @@ in {
     ];
   };
 
+  # Fix for bugged dark theme on glabels-qt.
+  glabels-qt = let
+    themePatch = prev.writeText "theme.patch" ''
+      diff --git a/data/glabels-qt.desktop b/data/glabels-qt.desktop
+      index dad65b3..5a5670b 100644
+      --- a/data/glabels-qt.desktop
+      +++ b/data/glabels-qt.desktop
+      @@ -2,7 +2,7 @@
+       Name=gLabels Label Designer 4
+       Comment=Create labels, business cards and media covers
+       Keywords=label;card;print;office;barcode;
+      -Exec=glabels-qt %F
+      +Exec=env QT_QPA_PLATFORM=wayland QT_STYLE_OVERRIDE=Fusion glabels-qt %F
+       Icon=glabels
+       Terminal=false
+       Type=Application
+    '';
+  in
+    prev.glabels-qt.overrideAttrs {
+      patches = [themePatch];
+    };
+
   # Custom iosevka build.
   iosevka = prev.iosevka.override {
     set = "Custom";