Currently, SE allows one to change an up- or down-vote once the question has been edited. This seems sensible, as it allows one to to ensure that the vote reflects the current content. However, the vote-to-close and vote-to-open buttons do not allow one to change their vote if/when the content of the question changes. This seems inconsistent.
Allowing votes to reflect the current content would be more consistent with the voting pattern allowed elsewhere. It might also provide incentive for people to improve closed questions, or questions at-risk for closing due to the number of close votes.
Shouldn't a change in question content allow users to revise their close/open votes?