Added full width attribute to the autocomplete component

[hperrin]

You can do the same thing with

textfield$style="width: 100%;"

I can add this to the demos thought.

[hperrin]

I've added it here:

https://github.com/hperrin/svelte-material-ui/commit/2b82f60d4f486f2dda4accd6f55ce4b149d54664