Flexbox widget - form display type

Provided a workaround with the settings form as well as css declarations to account for these widget types:

• uuid - this field is hidden so we just skip it
• textarea - if its formatted (ie; the formatted checkbox is checked) then it could render in a wysiwyg which creates a wrapping element around the form field. This breaks the objective, so just disable it in settings and default value to 12 columns
• map_key_value - This widget renders in a table which creates a wrapping element, so disable setting and default to 12 columns.
• color_boxes - This widget uses the field suffix for the colorboxes as a sibling to the form element, so disable setting and default to 12 columns.