#3018: Dashboard: revamp dashboard layout engine, fix bugs

[santee]

Current dashboard layout is buggy and does not support any anchoring / ruler / other features.

Investigate layout engines libraries and build a package that is more usable.

In addition, proper binding / labels should be supported

[dnillovna]

This issue has been mirrored in Jira: https://reddata.atlassian.net/browse/GROK-16539