Bug 35772: Remove double escaping

Bug 35772: Remove double escaping

Patch as proposed by Jonathan in a comment on bug 29002

If a patron has HTML character in surname or firstname, Select2 will escapeHtml twice.

To test:
* Edit a patron, set firstname: <span>test</span>
* Place booking, search for test
* It shows correctly in the result, but when you select it you will see "&lt;", etc.
* Apply patch
* Verify the display is now corrected.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>