Bug 18654 - Translatability: Get rid of tt directives starting with [%% in translatio...

Bug 18654 - Translatability: Get rid of tt directives starting with [%% in translation for itemsearch.tt

This patch removes entries like the following in translations of itemsearch.tt:
"[%% INCLUDE form_field_select name=\"homebranch\" options = branches "
"empty_option = \"All libraries\" %%] [%% INCLUDE form_field_select name="
"\"holdingbranch\" options = branches empty_option = \"All libraries\" %%] %s "
"[%% INCLUDE form_field_select name=\"location\" options = locations "
"empty_option = \"All locations\" %%] %s "

New patch on top of Bug 18633 that resolves parts of initial comment.

To test:
- Verify that in itemsearch.tt no tt directives are splitted by new lines
  (search for [% INCLUDE )
- Verify that itemsearch.tt works as before

Followed test plan and verified that tt directives are not split by new
lines, the changes to the fieldset tags in comment 3 have been removed
and itemtype.tt still works correctly as before

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>