Bug 20332: Allow translating some grouped opac results texts

Bug 20332: Allow translating some grouped opac results texts

The grouped OPAC results page has several untranslatable
javascript-added texts, including the selection modifiers "Clear all"
and "Select all" links, and the entries in the shelves/lists dropdown.

Compare to opac-results.tt

Signed-off-by: Pasi Kallinen <pasi.kallinen@joensuu.fi>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>