Bug 13094: Make it easy to hide 'Cancel all' button on holds over report

Bug 13094: Make it easy to hide 'Cancel all' button on holds over report

This patch makes some small modifications to the 'Holds awaiting pickup'
report:

- Fixes typo sypref
- Fixes 'Home branch' to 'Home library'
- Adds a span to easily hide the cancel all button with CSS

To test:
- Make sure you have a hold appearing on the awaiting pickup list
  second tab: Holds waiting over...
- Verify the 'cancel all' button on top shows
- Verify syspref and Home library changes mentioned above
- Add #holdsover-cancel-all { display:none; } to IntrentUserCSS
- Verify that the button and the text have vanished

Note: If the text doesn't display next to the button, try toggling
      the TransferWhenCancelAllWaitingHolds system preference.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 39e4c6c5d791853985773e4032357372f77d7587)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>