dumper.js: missing entry in liveItems stops build()
dumper.js: private 'liveData' refactored to function variable 'repository'
templates: removed unused class .tracy-alt and table
Dumper::toJson() added property hash
Dumper: support for separated snapshots

- fetchLiveData renamed to fetchSnapshot
- thx @JanTvrdik for cooperation
Debugger::barDump() uses live dumps