[RSS] Sort by feed date instead by added time

[Brli]

in the "All RSS Feeds" tab, feeds are sorted in terms of sources, not the feeds' date.

Please sort the feeds based on tagged date/time instead of current behavior.

[Brli]

The merge doesn't parse GitHub release note(01) date correctly, sorry for the reopen.

1. eg. https://github.com/DimensionDev/Flare/releases.atom

[Tlaster]

The merge doesn't parse GitHub release note(01) date correctly, sorry for the reopen.

1. eg. https://github.com/DimensionDev/Flare/releases.atom

It might be better to open a new issue for the date time parsing issue.