Fix Disko Config for Current System and Fix dwm polybar override

- Restore luks-btrfs-subvolumes.nix to old subvolume / swap size
- Make a copy of modified luks-btrfs-subvolumes.nix for future use
- Disable the polybar patch step which doesn't work
- Add git as a build input for polybar-dwm-module

system/gui/dwm.nix

@@ -58,7 +58,10 @@
 
       buildInputs = previousAttrs.buildInputs ++ [
         jsoncpp
+        git
       ];
+
+      patches = [];
     }))
   ];
 }