Sort on issue number instead of release date

[gerrewsb]

Is your feature request related to a problem? Please describe.
Kapowarr sorts issues based on release date. As of now, there is no way to sort the issues otherwise. When a new issue is added to the list but no release date is available yet, it gets added at the bottom of the list instead of the top. Also issues that get released later but should come before a certain issue aren't added in the correct spot. For example issue #0 that's released after issue 12 gets added on spot 13 instead of spot 0.

Describe the solution you'd like
Sort issues based on issue number instead of release date. Or give the option to sort by clicking on the headers.

Additional context