Added Zotero.DataObjects.sortByParent() to sort child items immediately
after their parent items. Zotero.DataObjects.sortByLevel(), which is
used for collections, sorts each level together, but that's less
appropriate for items where, e.g., an embedded-image attachment should
immediately follow the note that depends on it.
With icons to identify collections and searches
Also:
- `savedSearch` search condition in general
- Clean up some search window code
- Reorganize search tests
Also:
* _finalizeErase in Zotero.DataObject is now inheritable
* Call _initErase before starting a DB transaction
* removes Zotero.Libraries.add and Zotero.Libraries.remove (doesn't seem like this is used any more)
Get rid of data_access.js, at long last. Existing calls to
Zotero.getCollections() will need to be replaced with
Zotero.Collections.getByLibrary() or .getByParent().
Also removes Zotero.Collection::getCollections(), which is redundant
with Zotero.Collections.getByLibrary(), and Zotero.Collections.add().
The latter didn't didn't include a libraryID anyway, so code might as
well just use 'new Zotero.Collection' instead.
