Optimize dynamic calculations in Notifications.

[ellykits]

Toast notifications allow for passing dynamic text to their title/message. Internally the notifications uses a calculation listener that updates UI wherever the calculation is changed when the rules are fired.

Currently when a calculation field changes for a toast notifications all the calculation listeners are fired when we only need to update the UI for toast notification whose calculation has been update. We need to build a dependency map like we do with other field calculations without having to create a new attribute but maintain the field calculation template.