on scrollable areas

created via remote look-up when domains differ but point to the same resource

This makes the UI appear less laggy. After all, the status *is* created
right there and then, it's the distribution to home timelines that can take
a while

a11y: Improve icon button component regarding semantics, screen reader usage

a11y: Add labels to input fields for screenreader

Add touch icons for Chrome, iOS and Windows 10