* - disable device when error indecates that the problem is not solvable on reconnect
- introduce a preOpenDelay of 2 seconds (currently value is hardcoded)
* rs232:
- make preOpenDelay available via webui
- fix preOpenDelay
- add basic usb serial detection
* - revert 3819ae7
- fix schema files
* make json checks compat with utf8+bom
* make shutdown effect a bit more flexible
system shutdown is disabled by default. enable it in json (set false to true)
the shutdown is abortable. simply select another effect before shutdown time reached
this effect is made for linux and did not workl on windows without modifications
Former-commit-id: 32f92246fbc87de576e4b1059dd319646917ec74