Further issues with search

[cmgrote]

Identified further edge cases in searching that are problematic:

• partial string match (eg. endsWith) against a qualifiedName on a file-based asset needs to avoid including empty names for contextual items like host or file path, when these are not available in the partial string itself.
• any match against a qualifiedName of a user needs to properly construct the search criteria since its _name is in fact the concatenation of the courtesy_title and full_name fields (cannot use the context, which will always be empty for these types, or _name alone to search).