And also a bunch of other UI fixes in the devices table:
* It's the devices table, don't need 'device' in all the headers
* Not really necessary to label checkboxes with 'select'
* Stop table from moving down when the delete button appears
Fixes https://github.com/vector-im/riot-web/issues/10216
With this more of the
controls that look like buttons can be operated via the keyboard and
navigated to by screen reader users. This includes editor buttons such
as File upload, Audio / Video call, Right pannel hide button, Jump to
the bottom timeline button, and some more buttons found in the user
settings.
Also I have added alt texts to some images that in turn label buttons
which these happen to be packed in and removed some untranslated alt
texts from decorative non-actionable images that might add more
verbosity when talking about screen reader user experience.
