Bug 18684 - Get rid of %%] in translation for currency.tt

Bug 18684 - Get rid of %%] in translation for currency.tt

File add koha-tmpl/intranet-tmpl/prog/en/modules/admin/currency.tt exposes
parts of template directives due to html tags inide directives. Fix it using
the HtmlTags filter.

To verify:
- Create a translation for a language 'aa-AA
- po file aa-AA-staff-prog.po / translate.koha-community.org for 17.05 contains a line
  '%%]'%sCurrencies %s
To test:
- Apply patch on top of Bug 18665
- Recreate translation
- Verify that line above is gone
- Verify that in staff client currencies administration wors as before

Followed test plan and it worked as intended
Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>
Bug 18684: (followup) Move 2 closing h3 tags to end of previous lines

See comment #4

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>