Script editor no longer scrolls when you move line with Alt+Up/Down

[MewPurPur]

Tested versions

Reproducible in 4.3.beta2

System information

Godot v4.3.beta2 - Pop!_OS 22.04 LTS - X11 - GLES3 (Compatibility) - Mesa Intel(R) Graphics (ADL GT2) - 12th Gen Intel(R) Core(TM) i5-1235U (12 Threads)

Issue description

Script editor doesn't scroll to the caret when you press Alt+Up/Down. Works on any GDScript file opened in Godot. Used to function correctly in 4.2.2

Steps to reproduce

N/A

Minimal reproduction project (MRP)

N/A

[AThousandShips]

Haven't bisected but might be a regression from:

• Overhaul multicaret editing and selection in TextEdit #86978

As it touched the relevant code

CC @kitbdev