Hint requests are handled even when no hints can be shown

[szdc]

In your existing code, when hints are explicitly called on an attribute, you are returning true without checking whether you can actually provide hints for the attribute. This means your extension is handling hint sessions when it shouldn't be, causing extensions with lower priority to never get run.

I have created a pull request with a solution to a repository that forked yours, but I don't know how to make a pull request to yours with just my changes so I've created this issue.