Tremolo stem direction does not update in Properties panel when tremolos are flipped with keyboard shortcut

[oktophonie]

(Spun off from #18259; thanks to @LupusCaeruleus for the original)

Issue type

UI bug

Bug description

Unlike independent notes, pressing X to flip the tremolo beam will not update the state of the Stem direction buttons in the properties panel. The buttons will only update after the user de-select and re-select the tremolo notes.

Steps to reproduce

1. Select a tremolo beam, press X for multiple times.
2. See the Stem direction buttons in the properties panel.

Screenshots/Screen recordings

248565924-808ec850-563c-46a4-893a-98dbca63fc3b.mp4

MuseScore Version

4.1.0

Regression

No.

Operating system

Windows 10, Linux