I've implemented the look and feel options that were planned in project proposal. [1] Now there are three view modes:
 * list, showing tiles with labels divided into categories
 * grid, presenting only preview tiles contiguously
 * tree, presenting preview tiles divided into categories

There can be more pattern files in inkscape stock directories. Each of them is shown as a category. The categories
are opened by default. Hovewer the user can close some of them.

[1] https://www.dropbox.com/s/ezd82tfcb5zo0x6/pattern-selector-2.mpeg