[BUG] Eww spawns zombie windows and processes #255

Checklist before submitting an issue

• I have searched through the existing closed and open issues for eww and made sure this is not a duplicate
• I have specifically verified that this bug is not a common user error
• I am providing as much relevant information as I am able to in this bug report (Minimal config to reproduce the issue for example, if applicable)

Describe the bug

Basically, launching widgets will open your widgets, but sometimes they'll spawn, but refuse to close. Trying eww kill will kill the daemon, but these windows will not be closed. killall eww, however, works.

As far as I can predict, this issue happens after making eww daemon not a dependency for launching eww widgets. I'm not quite sure though.

Reproducing the issue

Use any config and create a widget. Bind the opening of your window to a keybind. Do not launch eww daemon. Press your keybind. Eww will not open windows immediately which is expected.

Now, before eww has finished opening the window, press the keybind again. Try to close this window with the eww close command. It will not work. The only way to remove the window will be killall eww.

This also happens sometimes randomly even when the daemon is running, but I cannot consistently reproduce it.

Expected behaviour

Eww windows to close with the eww close or eww kill commands.

Additional context

Logs:

The log says Closing all windows. However, windows aren't closed.