Bug 36970: (Bug 34160 follow-up) Barcode should be html filtered, not uri filtered

Bug 36970: (Bug 34160 follow-up) Barcode should be html filtered, not uri filtered

If a barcode (in rare cases) contains a space, with bug 34160, it is
converted into %20 in holds queue view (because of mistakenly applied
uri filter).

Nota bene, in parallel lines of view_holdsqueue.tt a right filter is
used for the barcode.

Test plan:
==========
1. Have an item with the barcode containing a space.
2. Make a hold on it, run build_holds_queue.pl
3. Go to Circulation > Holds queue ; select your branch etc.
4. You should see '%20' instead of the space in the barcode.
5. Apply the patch, restart_all.
6. Repeat p. 3.  You should now see the space in the barcode.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>