Add "Go to live" button (unblank)

[Azaziah]

Some of the users are confused by the toggle
functionality of the "Blank" buttons.

This means they do not know how to resume "Live" if they press the blank button.

I think it would be a good idea to add "Live" button,
which would always unblanks the display.

Additionally the "Toggle" functionality could be disabled/removed
from the Blank buttons.

Current version when wishlist item was created: 2.4.5

[Mike (mikey74)]

Adding/Creating tests seems rather complicated. I am not really familiar with Python, so my venture into the code was limited to minor code changes. If someone wants to take the burden of completing the necessary tests, please feel free.

[Azaziah (suutari-olli)]

Mike, you probably wanted to comment here?

https://code.launchpad.net/~mikey74/openlp/dvdplayerfix/+merge/320253

[Huw Williams (huww)]

This is a problem that we find every time we use the software (every other week). Do you know whether and when an optional (or permanent) "live" button might be added?