* Light client improvements (#6156)
* no seal checking
* import command and --no-seal-check for light client
* fix eth_call
* tweak registry dapps lookup
* ignore failed requests to non-server peers
* Fix connecting to wildcard addresses. (#6167)
* Don't display an overlay in case the time sync check fails. (#6164)
* Small improvements to time estimation.
* Temporarily disable NTP time check by default.