UI to set reserve interval on instrument

Pricing model changes (Task #73569)
enforce reservation min as multiple of interval

Pricing model changes (Task #73569)
enforce schedule rules as multiple of products.reserve_interval

Pricing model changes (Task #73569)
comment

Pricing model changes (Task #73569)
clean up with let

Pricing model changes (Task #73569)
enforce duration as interval

Pricing model changes (Task #73569)
min options should step by interval; smarter default duration

Pricing model changes (Task #73569)
front end validation of reservation duration

Pricing model changes (Task #73569)
keyup event works best

Pricing model changes (Task #73569)