Added information about Locus version
(cherry picked from commit 0bdbdb1b205b1cae469cf1dbc0129b151a3e295e)
Fixes in GPX download and locus integration
Locus API upgrade and integration fixes for v. 2.19.0 (internal: 272)
Fixes in database dumper
Fixed problems after user login removal, and possible (at least with
APIv8) background thread access to UI