Add ability to hide not planned tests

[pehala]

A fair share of tests are not planned for specific release (~190 for 2024.2) and as such are not planned, however, they still show at the list, which creates visual clutter and can be severely confusing for a newcomer (like me).

I propose adding an option to hide not planned tests and groups that contain only not planned test either as user option or a general button on a site

[fruch]

@pehala

you are referring to "not planned" ones ?

[pehala]

Yes, sorry for the confusion, I updated name and the description