This feature will be updated soon by musing team as they are working very actively and recently they have updated the answers writing section of editing and they have also given the image URL where you can use the image URL link and upload in the musing answers to determine what the answer is and what is the content about.
So they are updating their website regularly and making their site very innovative and must say i love the team of musing as they are making their users very happy.
I have not found other site like this in my online field so no need to worry they will update their app soon and there will be question editing section also soon.
But i want to ask what you will do after editing your question? Because question cannot be make innovated and looks beautiful as answer look.
Thanks for your answer and I mentioned all these things in my question description as well! I think musing is the best thing on the Steem blockchain since its inception and the team behind it is showing they really have a grand vision. Messaging will be like a huge cherry of achievement in top and others will perhaps even begin to use it for just that reason.