"Search for tile" feature

Working with large tilesets (or a large number of small tilesets) it can be hard to find the exact tile you want.

Being able to name (or otherwise label, tag or textually describe) each tile in a tileset and then search for tiles by name would go a long way towards solving that problem.

The issue names no files, tests, or entry points; begin by locating the tileset and tile-browsing code in the editor and review the existing discussion. Done means tiles can be given searchable textual labels and users can reliably find the intended tile across large or multiple tilesets.

Written by the indexing model from the issue text.