When hovering over a file on the not-focus view panel, the information panel gets updated

Test Plan:

• In Dolphin with two views (split view) and with the information panels
• Hover over a file on the not selected view
• > the information panel show information about this file

No other changes in behavior

Reviewers: Dolphin, elvisangelaccio, ngraham

Reviewed By: Dolphin, ngraham

Subscribers: kfm-devel

Tags: Dolphin

Differential Revision: https://phabricator.kde.org/D19936