Tweak FAB sizing method (fixes #2398)
Tweak FAB sizing method (fixes #2398)

Ref: https://stackoverflow.com/questions/56945314/floating-action-button-fab-icon-size-problems-after-migrating-to-sdk-28

inorichi/mangafeed,CarlosEsco/tachiyomi,inorichi/tachiyomi,inorichi/tachiyomi,inorichi/mangafeed