Hide related tags when tag groups are displayed

[HWFord]

With some conditions:

1 tag is selected that isn't a tag group option, display related tags
1 tag is selected that is a tag group option, display tag groups select boxes

when multiple tags are selected that are all tag group options from different groups, display tag groups select boxes
when multiple tags are selected that are all tag group options with at least 2 from the same tag group, display related tags