Per discussion in https://github.com/nolanlawson/pokedex.org/pull/64#issuecomment-257191919, I'd rather have screen reader support while also avoiding janky animations. The default MUI animation for label text looks great on desktop but on mobile it's very low-framerate. This PR puts a label offscreen that only a screen reader can see, using the sr-only class convention from Bootstrap.
Per discussion in https://github.com/nolanlawson/pokedex.org/pull/64#issuecomment-257191919, I'd rather have screen reader support while also avoiding janky animations. The default MUI animation for label text looks great on desktop but on mobile it's very low-framerate. This PR puts a label offscreen that only a screen reader can see, using the
sr-onlyclass convention from Bootstrap.