forms and fields with error messages

[nkryptic]

This does have some overlap to issue #1939, but I'm targeting the overall use case for forms. It's fairly common to update a form with error messages using js or to display some error messages after an unsuccessful submission. Some errors might target a field, while other might be global in nature. See the following jsfiddle for examples:

http://jsfiddle.net/HFzQv/

The first form displayed has a form-level error message (not isolated to a certain field). One way to markup/style that would be for it to be an .alert, but I'm not certain if that is the correct usage and/or if you guys might have another approach in mind for this.

The second form shows a field in an error state with an error message for the field just before the field's .help-block providing general help on filling out the field. It seems like the error message for the field should stand out; as it is now, it seems lost along with the other text. Thoughts? (this is the part that is also addressed by #1939)

[andriijas]

Feels like a duplicate of #1939

[nkryptic]

@andriijas, I did mention twice that there was some overlap with #1939. But, I'm also including form-level errors as part of an overall issue where a design decision is needed.

[andriijas]

I know you did, I just dont see any that you are adding that extra details to the issue but overhead of duplicate issue.

[mdo]

For general form errors, go ahead and use the alert component without a close icon. No need to create another pattern just for that.

Closing since that's addressed, and the rest is addressed in #1939.