[web] Keyboard support for typeahead [4/13] - Renamed regex

Summary:
Renamed regex. It might be redundant, as it is placed in web directory, but it doesn't hurt.
Native typeahead will be placed in native dir and named accordingly.

Test Plan:
Typeahead without keyboard support works.
Final tests performed in last diffs.

Reviewers: inka, kamil, ginsu, tomek

Reviewed By: ginsu, tomek

Subscribers: ashoat, atul, tomek, ginsu, kamil, inka

Differential Revision: https://phab.comm.dev/D6044