grepview: Convert tr() calls to i18nc() to make strings translatable

Authored by aspotashev on Sep 4 2016, 4:16 PM.

Description

grepview: Convert tr() calls to i18nc() to make strings translatable

Reviewers: kdevelop-devel, kfunk

Reviewed By: kfunk

Differential Revision: https://phabricator.kde.org/D2655