better searching through of dictionaries on the main page

[cukrmi]

Is your feature request related to a problem? Please describe. You can have dozens or hundreds of dictionaries. It is not easy to quickly find the required one with using Ctrl+F if many of your dictionaries have the same part of names.

1. Autocomplete search.
2. Adding some tabs (like they in Sketch Engine on corpora list) - All, My dictionaries, Shared with me.
3. Filtering by language could be also beneficial.