can not copy error messages from dialogs

### Expected behavior

Can copy text from JMeter error dialogs.
For example by ctrl+c like in most Windows dialogs.

### Actual behavior

Can not copy dialog text.

Not even by using special tools like the Textify app (link below).

### Steps to reproduce the problem

Use JMeter until an (error) dialog is shown.

See my other report today for example: issue #5776

### JMeter Version

5.5

### Java Version

Oracle 11.0.13

### OS Version

Microsoft Windows 10 Pro [Version 10.0.19044.2251]