[Enhancement] Change APP_UID from 'libprs500' to 'Calibre'
This is a very minor issue,
but is possible to change the APP_UID value in src/calibre/
The APP_UID is used as application name and it looks very strange in some windows selector.
For example I'm using Ubuntu XFCE, see the attached example.png to see how it looks (compared to Firefox).
Thank you and compliments to all Calibre developers for the great work.