Summary:
With the rename dialog upstreamed in D17595, we can use it from there.

This will require the KF5 dep to be bumped to 5.67, which should be feasible given that we're at the very beginning of a new Applications cycle.

Depends on D17595

Test Plan:
1. Dolphin Settings > uncheck "rename inline"
2. Rename one or more files. Observe that it still works

Tests still pass.

Reviewers: #dolphin, elvisangelaccio, meven

Reviewed By: elvisangelaccio, meven

Subscribers: meven, broulik, kfm-devel

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D17597