icons don't appear on mouse move

[ppazos]

The icons are shown initially, then disappear. When I try to go back to the app and close it, tried to move the mouse over, clicked on many places, but the icons don't appear.

I'm on Mint 19.3 based on Ubuntu 18.

Besides that, the app works great, thanks for sharing!

BTW: it would be nice to have a key combination to show/hide the menu, or just show the menu on right click.