Minor bug fixes & improvements

[beckyjackson]

• Render HTML in cell values (e.g., <br/>)
• Fix placement of validation messages under cell when expanding message
• Fix collapsing validation message
• Add 1 and total results to list of limits shown in HTML form
• Fix passing headers to Jinja template for vertical view
• Quote table name to allow for tables such as table
• Display result in vertical view when there is only one result, even if the limit is not 1

[jamesaoverton]

Great, thanks!