Screen Mngr (Keep screen on) description

Allows to keep screen on while a preselected application is in the foreground or while charging.

Will be useful when browsing, reading mail, etc...

A set of keeping screen on conditions can be extended using plugins by the following:
- keep screen on while a user is looking at the screen;
- keep screen on when a specific activity is detected (walking, cycling, driving).

Allows to turn off the screen based on close proximity.