Search x2x fields

Standard behavior in advanced search for one2many, many2many and many2one fields is to do a name_search. This often is not satisfactionary as you might want to search for other properties. There might also be cases where you don't exactly know what you're searching for, then a list of possible options is necessary too. This module enables you to have a full search view to select the record in question, and either select specific records or select them using a search query of its own. Backported from 8.0 to 7.0, the same functionality that appears in the new v8 search area will appear in the v7 search dropdown. To improve usability a small javascript modification has been introduced so that the main search popup doesn't close when closing the advanced search domain popups.