Per Mailing list recommendations adding in support for checking if the item has a location set, even if the authorized value isn't set.

- Loosened a comparison to make default pickup location selection work properly when request groups are in use.

- Fix a problem where ajaxLoadTab fails to load a tab when the domain name begins with the VuFind path (e.g. http://vufind2.local/vufind2/Record/something). 

Added missing fullstops for delete favourites messages (all latin-based languages and Russian) (#806)

- Change the static date of 2099, to the date the item was lost,
as the due date.

- eslint issues
- hidden checkboxes were not toggling correctly, so functionality was broken

- Thanks to Ere Maijala.

- Thanks to Ere Maijala and Leila Gonzales.

- Thanks to Ere Maijala

- Load Google library once per page, instead of once per Captcha
- Allows proper functioning of multiple embedded ReCaptchas in a single set of search results

Now that paths are evaluated the same, no need for global img-path variables. Replaced with more direct paths.

- Detect and handle "unknown" relators
- Add support for configurable mapping of relators to standard codes
- Add support for indexing of raw relators
- Thanks to André Lahmann for significant support on this work

* removed strip_slashes on json post data as it would invalidate json string if it contains chars that need to be escaped (#801)

- Handling words with trailing question marks in the middle of the search string just like those at the end were previously handled.