There is an issue with plyer on Windows, which I thought was related to the mixed
backwards/forward slashes in the path, but no, this change still did not fix it:
```
1.84 | D | gui.qml.qeapp.QEAppController | sending push notification to OS: message='heyheyhey'
Traceback (most recent call last):
File "...\electrum\electrum\util.py", line 1111, in run_with_except_hook
run_original(*args2, **kwargs2)
File "...\Python310\lib\threading.py", line 953, in run
self._target(*self._args, **self._kwargs)
File "...\plyer\platforms\win\libs\balloontip.py", line 206, in balloon_tip
WindowsBalloonTip(**kwargs)
File "...\plyer\platforms\win\libs\balloontip.py", line 130, in __init__
raise Exception('Could not load icon {}'.format(app_icon))
Exception: Could not load icon ...\electrum\electrum\gui\icons\electrum.png
```
6e46fb329d