Modern CSS layout modules like flexbox makes the Image Float field somewhat outdated. It is the equivalent of having something like...

You will never cover every option that is available regarding aligning such items so I would suggest changing this to a far more versatile Image Class field. Classes can then be created within the template for alternative styling of the image if needed. For some template designs, floating images may not be suitable especially considering other layout properties now exist (eg. flex). By having this Image Float field, template developers are forced to consider these images may be floated which restricts the design or otherwise breaking this option.