Feature Request - adding more groups to file types filter

I'd like to request that a 'category' be added to the file types filter (Quickfilter?) for these categories of file types:
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This is what I mean by 'categories'
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Currently, I find unknown file types by using the Find Filter to filter out files in the supported categories, then scroll the list of files to find files with 'File' in the Type column.

The problem with this is that menu works by building up a wildcard filter pattern based on the file extensions in the selected group. There isn't a way to write a wildcard filter to select unknown file types by file extension (it would be an infinitely long list of every possible file extension except for those in the known groups).

We'll put it on the list to think about but I can't see an easy way of implementing at the moment.

Thank you for the explanation.
Might it be possible to add an 'Other' category for all files NOT in any existing category?