[versioncontrolobserver] Update working directory on tab activation

Authored by anthonyfieroni on Feb 2 2019, 5:38 PM.

Description

[versioncontrolobserver] Update working directory on tab activation

Differential Revision: https://phabricator.kde.org/D18605

Signed-off-by: Anthony Fieroni <bvbfan@abv.bg>