Request form fixes

[Calvinp]

Makes the following changes in the New/Edit Request Form:

• Fix the Owners field - now it's a multi-input instead of a multi-select. Much more appropriate for the field type.
• Fix many, many linting errors
• Use the same field metadata style as the New Deploy form
• Validate fields (eg. number fields fail if they can't be parsed as an int)
• Feedback to user on which fields are preventing the form from being submitted
• Use FormGroup components instead of writing out the form groups

[Calvinp]

@tpetr @wolfd @kwm4385 This is now ready for you to take a look (and the diff is nice).

[tpetr]

LGTM