Clear obvious wrong hints (Unequal, Towers, Keen, ...)

[Hessi9]

A lot of games offer the feature to add all possible hints (numbers,...) to every field - a very usefull option. Unfortunately then a lot of work is required to remove hints that are obvious wrong.
I would like to request the feature to remove all obvious wrong hints automatically. This feature is already mentioned at the documentation a.e. at Unequal when pressing the h button.
I would suggest make this feature accessable by pressing the "fill all possible hints" button a second time for filtering.
This feature would save so much time at a lot of puzzles!
By the way I realy realy love this puzzle collection!

[Hessi9]

Sorry, I have seen this feature is "not goal of this project" so I will contact Simon Tatham to get it implemented there first.