Trying to fix my bad Move Tool patch.

Summary: Revised method implementation MoveDiskrete. It turned out that the ending is lost when trying repetition. Added blocking signals from the spinners.

Reviewers: Krita, woltherav

Reviewed By: Krita, woltherav

Subscribers: woltherav, rempt, dkazakov

Tags: Krita

Differential Revision: https://phabricator.kde.org/D2362