Advanced search master

[azerbini]

Several bugs yet with Group Search:

• Interpretation Group: any search fails within this group, see below

• Disturbance/Threat/Form Groups: no results are returned where results are expected. E.g. see search below, which should return 1 result but doesn't

Bug with JS of advanced search:

• When multiple search boxes are present, if the user refreshes the page he will get a TypeError on termFilterGroup

[azerbini]

Thanks @ahaith & @markdoub, new commits seem to fix the underlying search issues. Remaining problems:

• Bug with JS of advanced search, when multiple searches are added and then the user refreshes the page, the TypeError on this.termFilter[i].termFilterGroup appears. This only happens when multiple boxes had been created, none of which containing any term.

• The Advanced search delete button allows the user to delete all search boxes, including when only one is present. The X button should be disabled when only one search box is present.