on Windows, create_file_dialog() is not disposing of dialog after ShowDialog()

[pemn]

Specification

• pywebview version:
  1.4.2
• operating system:
  Windows 10.0.22000.2899
• web renderer:
  webview.platforms.winforms

Description

When calling any create_file_dialog(), the dialog is not being disposed (dialog.Dispose()). So the python process does not finish after the main window is closed. Not even keyboard interrupt (CTRL+C) will terminate the process. Only taskkill is able to kill the python process.
Im not sure if calling dialog.Dispose() will be enough to fix the issue, but thats a good start.

images and a minimal test file on the zip:

test_bug_filedialog.zip

Practicalities

• YES/NO I am willing to work on this issue myself.
  NO
• YES/NO I am prepared to support this issue financially.
  NO

[r0x0r]

I ran your example and could not reproduce the problem. If calling dialog.Dispose() solves it for you, feel free to submit a PR.