Fixes some issues around snackbars sometimes being out of view.
(cherry picked from commit 479eb1ba71e5dc0529f521a9cc4268eb731dc83a)
# Conflicts:
# app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/BrowseSourceController.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt