Wrong slur segment is moved when dragging a slur which spans more than one system

Issue type

UI bug - (Score element/user interaction)

Bug description

Same behavior occurs in 3.6.2, so it is not a regression. Anyway, figured it was worth checking up on 4.1, and the undesirable behavior still occurs of moving the wrong slur segment.

Steps to reproduce

1. Let there be a slur that spans across a system into another system.
2. Select that slur from the first system
3. Now perform a drag upon the slur segment existing on the following system.

Expectation: the second segment is selected and dragged

Results: The first segment is dragged around instead.

A strange behavior that could "easily" (haha) be fixed up with the proper knowledge of the code-base. I'm not sure, but I wouldn't be surprise if something like this happens with other things like a line segment, but I didn't check.

It's not based on "first" system but more of the first selected segment, whether that is the last or the first:

Screenshots/Screen recordings

https://github.com/musescore/MuseScore/assets/7139517/ac3a3683-3e58-4e97-a6e4-9ea71dced9ff

MuseScore Version

4.1

Regression

No.

Operating system

LNX XFCE