Chrome/Safari/Edge etc are all set already by the
`.numeric-setting-line-input::-webkit-outer-spin-button`
and
`.numeric-setting-line-input::-webkit-inner-spin-button`
but firefox needs a different line set on the input itself see:
https://www.w3schools.com/howto/howto_css_hide_arrow_number.asp
I removed some defunct properties - this introduced a couple
of problems, which are resolved by:
* no longer checking for fastAutofocusUri
* removing the unused prop availablePlugins from the calibration modal
I've changed tasksubmitter to accept a "thing" and "action" rather than a single URL. This seems more in keeping with
propertyControl, and eliminates the need for loads of
computed properties.
I've also deleted (rather than just commenting out) chunks of the web app that are no longer in use. These may be
reinstated in the future - but we can get them from git
history. It's less confusing not to have vestigial
code in the repo.
This builds OK but is not, as yet, tested with hardware.
Fixed a bug where incorrect values in the position control
caused incorrect relative moves.
Decreased the polling interval to make moves more responsive.
