TreeItem checkbox can be toggled when clicking to the left of the fold button

[KoBeWi]

Tested versions

4.3 dev6 and earlier

System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 31.0.15.4633) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

Issue description

Title.

mbPjXZ9a7T.mp4

I can't count how many times I tried to fold or unfold something and it toggled the checkobx instead. It's especially annoying when propagating checks, because it can cause information loss in a branch when not all checkboxes were enabled. I have a big REVERT button in case I accidentally toggle something and I use it alot.

I think the area to the left of the folding icon should fold instead of edit the item.

Steps to reproduce

1. In a tree with checkboxes (e.g. export preset resource list) click to the left of the fold button

Minimal reproduction project (MRP)

N/A

[kleonc]

Looks familiar... duplicate of #55774?