Replace dialog animations with fade when user prefers reduced motion
Replace dialog animations with fade when user prefers reduced motion

Fixes #12976
Fixes #2768

say25/desktop,j-f1/forked-desktop,say25/desktop,artivilla/desktop,shiftkey/desktop,artivilla/desktop,shiftkey/desktop,desktop/desktop,desktop/desktop,j-f1/forked-desktop,artivilla/desktop,desktop/desktop,say25/desktop,shiftkey/desktop,say25/desktop,j-f1/forked-desktop,shiftkey/desktop,artivilla/desktop,desktop/desktop,j-f1/forked-desktop