FAQ in docs

[icebob]

Things to add to the FAQ:

• Discrepancy, minor mistake, and inconsistency in the documentation and between similar functionnality: Discrepancy, minor mistake, and inconsistency in the documentation and between similar functionnality #145 (comment)
• Unknown custom element: Unknown custom element: <field-googleAddress> #222
• Multiple Fields in one line: option to put multiple fields on one line #224

[dflock]

Might be easier to create a "documentation: faq" label and apply that to the issues directly. I don't have permission to create labels, afaik.