Added time estimates to the dom against actions which have submissions . Estimates are calculated based on recorded averages and will appear in the dom after the first use of an action. Times are in miliseconds e.g. for an action with two submissions: rf.actionTimeEstimate="[3000, 4200]".
FIX: Submission URLs with properties and xpath.

Property placeholder names in the form flow now start with $ to match
those in forms.
Submission params now maintain the order they are defined
in the form flow.