Diff list: Collapse indicator of headings not clickable and can be invisible

[mstv]

Do you want to request a feature or report a bug?
ux improvement

What is the current behavior?
The heading of a diff list can be double clicked what will collapse/expand the list.
But neither a single nor a double click on the collapse indicator have an effect.

The collapse indicator can become invisible.

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem.

What is the expected behavior?
The diff list should be collapsed/expanded by single clicking the collapse indicator.
The collapse indicator should always be visible.

Environment you encounter the issue:

• GitExtensions version: master
• GIT version: 2.17.1.w.2-x64
• OS version: Windows 7
• .NET version: 4.7

Did this work in previous version of GitExtensions (which)?
have not checked yet

[RussKie]

The indicator was never clickable, the existing implementation doesn't handle this event. While it is an annoyance, it isn't a high priority issue right now. PRs are welcome though.

The fact that it may get invisible is a regression however.

[gerhardol]

You can double click the label to expand/collapse
Edit: I agree that this should be improved, but the prio is low.

[mstv]

I know, but it's not very intuitive to me. I don't use it every day. That's why it always takes some time until I remember / find out again how to do it. I agree that the additional event handler has low priority.

[mstv]

Today, I noticed that the indicator gets invisible when the scrollbar is activated due to long file names:

[gerhardol]

So this is not a regression at least?

[mstv]

Yes, no regression -- especially because I cannot see the indicator in 2.51.02 at all:

[pmme]

Also in #4886