Minor typography related improvements.
In Persian compound words are joined with Zero-width non-joiner character (\u200c) and
this change uses it wherever needed. Also Persian uses a different comma than
the English keyboard one and this uses that instead.
Co-authored-by: mister-ben <git@misterben.me>
Restore hidden label text for screen readers that describes what the button control does.
Renames the Duration Time language item to Duration.
Deprecate controlText_ property.
Fix a typo in translations-needed.md.
Add a space in the hidden label for live-display, so that it doesn't run together with the visible "LIVE" indication.
Fixes#5135
