Improve error messaging communication

[idiom-bytes]

Problem:

There are various errors happening in the backend and we need to highlight issues to users.

Right now it's only working based on signature rejection case. We should add other error cases as well, so everything is properly communicated to the user.

Definition of Good:

• [ ] Do not use the java popup.

Tactic #1:

• [ ] On forms, if an error takes place, we should highlight the field as red.
• [ ] On form pages, we have added an indicator/alert at the bottom, let's implement a simple message on the page view.

Tactic #2:

• [ ] Finally, use Sweet Alerts and display a popup to the users. We could use Sweet Alerts just for success messaes.

DoD:

• [ ] Let's implement Sweet Alerts for success messages, that highlight the success of the user.
• [ ] Let's implement page/field contextual errors & messages so there is less popups/blockers for the users, and they can fix errors while having to click fewer times.