Cutting folded region restricts scrolling after cut and after undo

[Cigam-HFden]

Tested versions

v4.4.dev2.official [97ef3c8]

System information

Godot v4.4.dev2 - Windows 10.0.19045 - OpenGL 3 (Compatibility) - NVIDIA GeForce RTX 3070 (NVIDIA; 32.0.15.6109) - 11th Gen Intel(R) Core(TM) i9-11900K @ 3.50GHz (16 Threads)

Issue description

Cutting a folded region restricts the scrolling, making the bottom of the code unreachable. Undoing the cut still restricts the scroll.

Steps to reproduce

Have code in a region, and code below it.
Collapse the region and cut, then check scroll
Undo cut and check scroll

Minimal reproduction project (MRP)

MRP:
mrp_restricted_region_scroll.zip

Video:
https://github.com/user-attachments/assets/bfc4394d-0714-49c4-88b7-0cf6f8d2508a

[kitbdev]

• possibly caused by the cache changes in CodeEdit: Improve render time by 2x #92865

[arkology]

I can reproduce it and also want to add that this happens not only with region folding but with any lines folding (like folded comments and functions).

[kitbdev]

• fixed by Fix total_visible_line_count calculation when removing and clearing TextEdit's text. #98678