Modify behaviour of catalog filter number count

[mkc73]

Catalog filter panel displays count of keyword tags in brackets after each tag. Suggest ability to update this count when in AND match mode to reflect current selection

So if have :

Elephant (3)
Lion (4)

when Elephant is selected want Lion count to change to show count for elephant AND lion.

Say my image database contains lots of images I have catalogued using tags animal : elephant, lion, ... and year:1900, 1901, ...
so catalog filter panel looks like :

animal
- elephant (60)
- lion (33)
...
year
- 1900 (2)
- 1901 (33)
- 1902 (7)
...

and I want to know which years have a lot of elephant pictures. Currently, I select elephant and then CTRL select/deselect each year one-by-one to see the number of images with elephant for that year.

It would be nice if the catalog panel did this automatically. So when select elephant, catalog panel updates to

animal
- elephant (60)
- lion
...
year
- 1900
- 1901 (12)
- 1902 (2)
...

i.e 12 images with elephant AND 1901 etc

Note :
--- This behaviour only sensible when AND match mode selected. It would not modify count if OR mode selected.
--- Would have to also modify behaviour of selecting a keyword tag so that could unselect the tag and see the original number counts i.e click on elephant selects elephant and modifies counts to elephant AND ..., clicking on elephant again unselects elephant and puts counts back to original counts.