Call cache cleaner when closing MellowPlayer

[ZeroDot1]

For Linux:
#!/bin/bash rm -rf /home/user/.cache/MellowPlayer/Covers/* rm -rf /home/user/.cache/MellowPlayer/QtWebEngine/Default/Cache/* rm -rf /home/user/.cache/MellowPlayer/qmlcache/* exit 0

Tested with Arch Linux.

[ColinDuquesnoy]

I don't think it is a good idea to clear the qmlcache, that defeats the whole purpose of this cache which is to speed up qml application startup.

For the QtWebEngine cache and the Covers cache, yes it could be useful. I'll add an option to run the cache cleaner on exit.