PlaylistDock: provide Repopulate and Turn off links in "Dynamic mode enabled" msg

I hope this will be agreed upon. The link's colour is rather similar to
background in my palette, but still readable. Any improvements welcome,
I can even make these small buttons.

Or perhaps we may move the "turn dynamic playlist on/off" button down
to the playlist statusbar? Perhaps hiding "track progression" button
that has no sense when dynamic is enabled? I have no strong opinion.

FEATURES:
 * Provide Repopulate and Turn off link in "Dynamic Mode Enabled" bagde.

DIGEST: Feature
GUI: Repopulate and Turn off links added to "Dynamic Mode Enabled" message