STUB: Client side session updating

[JennyRichards-Flexion]

#Title

#Description/Context
When we add/delete rows (repeater), it refreshes the page and erases all the existing data for all components.
Fix - when we add/delete rows it maintains session data.

This applies to any client side operation when doing validation of user input (do it in the browser rather than posting to the server).

#Definition of Done