Add error message next to fields

[enriquezrene]

When a user is creating new entries, there are some fields that need to be provided, when these fields are not filled, they are being marked in red. We need to add a label indicating this field is required. This is how it looks like right now:

We need to make them look like:

A generic message like this field is required would be good enough.

If the required fields are not provided, we still need to enable the save button. After clicking the save button the form must display the errors in the form.