[BUGFIX] Page tree does not visualize move targets

If moving an element to a different page, the page tree only
visualizes the change in the source page, but does not visualize
the target page.

The reason is that the move-pointer is used (t3ver_state=4)
instead of the move-placeholder (t3ver_state=3) in that case.

Resolves: #59114
Releases: 6.2
Change-Id: Iefa01e4c85e9fb753873d03e7638ac592c09a657