Bug 36557: (follow-up) Restore missing "Remove from list" control

Bug 36557: (follow-up) Restore missing "Remove from list" control

This patch restores the "Remove from list" control to the batch
operations toolbar when one is looking at the contents of a list. It was
unintentionally left out of the previous patch.

The patch also corrects some button markup to ensure consisten style of
controls in the batch operations toolbar.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>