Can't rename autoloads

[KoBeWi]

Tested versions

Reproducible in 4.5 46c495c
Not reproducible in 4.5 dev5

System information

W10

Issue description

Double clicking autoload name no longer edits it. I did not investigate exactly why, but seems like there is some editing attempt, it just does nothing (the editing field does not appear).

Steps to reproduce

1. Open Project -> Project Settings -> Globals -> Autoloads
2. Have at least 1 autoload in the list
3. Double click an autoload name
4. In dev5 it will open a LineEdit, on master it won't

Minimal reproduction project (MRP)

N/A

[timothyqiu]

Bisected and it's a regression from #106286.

CC @BrotherShort

[BrotherShort]

Bisected and it's a regression from #106286.

CC @BrotherShort

#106286 (comment)
Yes. I changed the Muti Mode Tree's Selecting Cells' behavior. So double clicking name cells can't open LineEdits.
Let me think about what to do with it. It's a problem. Without change, Couldn't fix that bug. With change, the new bug was created.