Fixed force unmounting with process kill

main.py

@@ -190,6 +190,9 @@ def unmountDisk(state: AppState) -> None:
         else:
             state.diskState = "disconnected"
     else:
+        print("force unmounting")
+        subprocess.run(["fuser", "-km", f"/mnt/{state.config.diskSerial}"], check=False)
+        subprocess.run(["sync"], check=False)
         subprocess.run(
             [
                 "umount",
@@ -256,6 +259,8 @@ def main() -> None:
         state.stopEvent.set()
         if state.diskState == "connected":
             unmountDisk(state)
+            if state.failedUmount:
+                unmountDisk(state)
         return