* Dev Walkthru: add a new Panel to the Dashboard

* small tweaks, review feedback

* fix bad code end marker

* flatMap

* Dummy comment to retrigger build

# Conflicts:
#	src/components/app/app.js

Add diagnostics logging for rule create/update events. Added the following metrics:
Rule_NewClick
Rule_EditClick
Rule_DeviceGroupClick
Rule_CalculationClick
Rule_FieldClick
Rule_OperatorClick
Rule_AddConditionClick
Rule_SeverityLevelClick
Rule_StatusToggle
Rule_ApplyClick
Rule_CancelClick
Rule_TopXCloseClick

Also includes new "sessionid" sections of diagnostics call, which logs the time in ms since Jan 1, 1970 when the page was loaded (amplitude expects session id in this format). This fields will be added by diagnostics to enable logging of session id to amplitude--until those changes go in it will be ignored by the backend.