[BUG]: Sort by `Id` is broken in 3.8.4

[juneidy]

Sort by Id is sorting by string representation instead of numeric.

Up until rssguard-3.8.3, sorting by Id works as expected where it sorts by numeric order.

Starting rssguard-3.8.4, the sort is based on the string representation, which is arguably not right.

How to reproduce the bug?

1. Show Id column
2. Sort feed by Id

What was the expected result?

Sort should be based on the numeric order.

What actually happened?

Sort is based on the string representation.

Other information

• OS: Linux 5.9.12-arch1-1
• Desktop Environment: awesome
• RSS Guard version: 3.8.4

[martinrotter]

Fixed, thanks for reporting, test with latest dev. build.