The popup window should appear only when the user is inactive

[bNobo]

Is your feature request related to a problem? Please describe.
The popup is often appearing whereas I'm writing or moving the mouse. It is very frustating because I'm interrupted in my work, sometimes in the middle of a word I'm typing or just before I click on a button.

Describe the solution you'd like
The popup window should appear only when the user is inactive (not typing and not moving the mouse). The amount of time to wait for inactiveness should be parametizable.

[bNobo]

I won't have time to implement this feature and make it parametizable at the same time because there is currently no settings screen. So I will just implement the feature with a default idle time value of - let say - 2 or 3 seconds and will create a new issue for the settings screen.

[bNobo]

#67