Keep renamed file(s) in view

When renaming a file, if its new name causes it to scroll out of view,
Dolphin will not scroll to the location of the new file.
This patch aims to address that. This affects all view modes.

CCBUG: 354330

Test Plan:
1. Have many files in a directory (or several files, just zoom in a lot)
2. Rename a file so that it will move out of view

Differential Revision: https://phabricator.kde.org/D6312