"Repeat" button should be made unsensitive when playing podcasts

Submitted by Sébastien Bacher @seb128

Link to original bug (#336479)

Description

That bug has been opened on https://launchpad.net/distros/ubuntu/+source/rhythmbox/+bug/35988

"When playing a podcast, the "repeat" mode is disabled : once the podcast has finished playing, you have to double click on it if you want to play it again, Repeat mode doesn't work.

However, the Repeat button in the toolbar, is not greyed out. To the user, it looks as if Repeat mode ought to work, but it doesn't as it's a feature, so it's confusing.

So would be great to make the Repeat button unsensitive/greayed out, when playing podcasts, to indicate clearly that it's disabled on purpose.

Also, the "Shuffle" mode (in my use case at least) doesn't make much sense for podcasts either, so maybe it could be made unsensitive as well."

Version: 0.9.8