Show a dynamic count of tags and icons directly within the map

This idea is based on a recent question.

Currently, MindManager formulas only work with numeric topic properties. This means that if you want to show a count of the occurrence of one or more specific text tags (including resources) or icons in a mind map (or a specific branch) you have to set up a SmartRule to create a numeric topic property for each tag or icon and copy the resulting set of SmartRules to every topic in the map. You then need to set up a formula on the central or main topics for each tag or icon to count the resulting properties.

It would be great if there was the equivalent of Excel's COUNTIF function to count the number of tags or icons in a map depending on their contents directly at the central and/or main topic level. This function would have to incorporate a trigger like a SmartRule to allow users to specify the relevant tag or icon group and then the specific tag or icon itself,

This should be possible to do, as MindManager already counts tags and icons in the map index (and can show these in column headings in the icon or tag view) - but currently there is no easy way to track these counts directly in the map itself. The ability to do so would also make it much easier to undertake basic statistical analysis, including for example comparing the occurrence of different tags or icons.

Finally,it would also be useful if a dynamic map legend could be inserted into the map linked to user-selected groups in the Map Index which would automatically maintain a count of each tag and icon.