Code Editor 2: Alt-clicking to highlight multiple lines at once and then typing only affects the final line

[gm-bug-reporter]

Description

In code editor one, a useful feature is being able to select and type on multiple lines at once by holding ALT and holding the mouse while dragging down, after which you can type on all lines at the same time. In Code Editor 2, you can still select multiple lines at once this way, but typing only inserts text at the final line.

Steps To Reproduce

1. Activate code editor 2
2. Create several comment lines as such:

---

//
//
//

3. Hold alt and click and drag downwards from after the first comment marker to after the third comment market, not that multiple lines at the same position are highlighted and ready for text input.

4. Type anything, and see that only the final line has text appended

The user would expect that each identical text is produced on each line simultaneously as is in Code Editor 1

Which version of GameMaker are you reporting this issue for?

IDE v2024.11.0.179 Runtime v2024.11.0.226

Which operating system(s) are you seeing the problem on?

Windows 10.0.22631.0

be333e6c-694b-4d36-b635-17606a9fdb5a

[KormexGit]

Looks like #5350 regressed, since this is the same issue. It does work with a fully vertical selection, but not if you select horizontally as well

GameMaker-Beta_0DHs1Y06tT.mp4

[zreedy]

Unable to reproduce in Red.

[Emc1923]

Unable to reproduce as of IDE v2024.1300.0.732 Runtime v2024.1300.0.743