Feature/several small fixes

[dukeofharen]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

• Order stub execution results in UI alphabetically.
• Sort and group configuration items in help page in terminal.
• Added option to response body helper to format JSON and XML strings.
• Updated YAML input formatting so a neat error message is returned if the YAML is invalid.
• Added option to go to stub when viewing stub execution result under request.
• Updated form body viewer in UI to correctly show request body if the sent body isn't actually a valid form body.
• Updated "request to stub" handler for form body. When form handler yields no results (e.g. form body is invalid) the handler will not be executed.
• Updated "update stub" endpoint so an HTTP 404 is returned when the stub ID in the URL does not exist.
• Fixed logging for condition checkers.

Does this introduce a breaking change?

• Yes

• No

• Update stub call now returns HTTP 404 if the stub ID in the URL does not exist. This was HTTP 204 before.

Other information