Suggestion: add sorting of file extensions by type to Count group

[NataliaBondarenko]

Sort extensions in Counter by type, for example: image - jpg, png, gif, bmp... video - mp4, avi, flv, 3gp... audio - mp3, wav, ogg... archive - zip, tar, rar, gz... and so on

This can be either a table with sections, or for each type separately.