UI Enhancements

[vlachouli]

1. Implement the can-deactivate-guard that displays a warning message when leaving a page with a dirty form.

2. Implement generic components for often used objects, e.g. Table, InputField, DateField, TextareaField, SelectField etc., that will have all the html and logic needed inside, so each time the developer needs to use such an object will have to write a minimum of code by passing the attributes to the generic component.