Change go-up/down-search symlinks target to go-up/down
Summary: go-up/down is more appropriate because go-top/bottom is supposed to be for skipping to the top or bottom.
Test Plan:
Before
After
Reviewers: VDG, ngraham
Reviewed By: VDG, ngraham
Subscribers: kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D19639