sRSS v23

A fork of Flym version 2.4.0 (https://github.com/FredJul/Flym) with the following changes:

• Option to remove thumbnails in listing (they were taking up way too much space!)
• Divider between articles to make it clearer
• Add option to increase text size applies to articles list as well as article
• Fixed bottom nav bar in darkmode
• Used menus to make more room for articles on the screen
• Number of bug fixes (especially around background sync)