RSS reader with support for RSS/Atom feeds

What's new in this version:
- Fix crash with problematic feed
- Fix parsing of feeds without titles
- Use basic preemptive authentication to work around some servers which do not send 401 challenges
- Fix update of tabs color when window gains/loses focus
- Prevent Vienna from appearing among dedicated browser applications in System Preferences/General
- Fix usability problem with search box
- Add DuckDuckGo and Qwant among options for search box
- Fix Twitter option for search box
- Use https for searching
- Add support for dark mode to Credits
- Fix tooltips in folders tree
- Update Sparkle to 1.21.2, autorevision to 1.21
CleanMyMacCleanMyMac X 4.7.4
MalwarebytesMalwarebytes 4.7.9
BraveBrave Browser 1.19.86
PhotoshopAdobe Photoshop CC 2020 22.1.1
LuminarLuminar Photo Editor 4.4.0
ProtonVPNProtonVPN 1.9.1
ParallelsParallels Desktop 16.0.1.48919
AppCleanerAppCleaner 3.5.1
SHAREitSHAREit 0.9.0
Total AVTotal AV 2020