Only Display "Edit Properties" if Class has Properties

[JohannesLipp]

If a class has no properties assigned, the "edit props" button does not make sense:

Please only display it if the selected class actually has properties. Thanks!

[alihussainiam]

@JohannesLipp please review

[JohannesLipp]

Looks good, esp. 758d32b thank you!

How will this be integrated into the main branch? Is it already in ma-hussain and will implicitly merge to main from there later?

[alihussainiam]

Thanks Johannes. Yes it will be merged later into main