There was a missed empty hash check. As well as rendering is now wrapped
in try/catch block, so app won't crash if any Blurhash component fails
to render its contents as it's not that critical.
This commit replaces all unnecessarily repeated code for decoding and
embedding blurhash canvases with separate component - <Blurhash>.
Under the hood Blurhash component will use effect dependent on its
props. This gives a few benefits: it will only be re-rendered whenever
the hash or width/height/dummy props update, and will not render if
canvas won't get to the final DOM, because then effect won't fire,
which prevents weird bugs like #14257.
Sasha Sorokin