"Delete server" button doesn't show properly on macOS

[softins]

Describe the bug

The "Delete server" button that was added in #3159 doesn't show properly on macOS. At least on my Mac running Catalina 10.15. The button is there, but it is too narrow to show the whole icon.

The button acts correctly when clicked on.

To Reproduce

Download and install a recent build artefact, e.g. from https://github.com/jamulussoftware/jamulus/actions/runs/8031934048. In this case, I installed the Mac Legacy, which had been built with Qt 5.15.2

Expected behavior

The button should be wide enough to show the backspace icon.

Screenshots

Operating system

MacOS 10.15 Catalina

Version of Jamulus

3.10.0dev-dbd6e61

Additional context

The button shows correctly on Windows, and when compiled on my Raspberry Pi. I haven't been able to try a more recent MacOS or the non-legacy build.

[ann0see]

That's bad. Does the same happen in the server where a comparable button is?

[softins]

That's bad. Does the same happen in the server where a comparable button is?

I will look more closely. Checking the various dev versions I have installed, it seems the delete button in the connect dialog shows up ok with Qt 5.9.9, but is truncated as shown above with Qt 5.12 or Qt 5.15. However, in all three cases the delete buttons in the Server Options page show up fine. I'll have to see what the subtle differences are.