More and customizable toolbar buttons

[Dreamer]

Ability to add/remove/move any button and add these buttons:

- switch to prev. channel
- switch to next channel
- renderless mode
- PIP (maybe 3 buttons - PIP, Multi Rec., Cancer Rec., then only channels in list - it would be clearer and more intuitive IMO)
...
- scan
- quick scan
- find channel
- device

[Dreamer]

Closing this one, check this new topic:

Reorganize Buttons Toolbar