~Wild Spirit Wolf~: I don't personally use edge a lot. However, this should help you out in regards to getting the normal formatting buttons to work on the site.
When you login to Mene, you'll notice in the address bar on the left hand side a small symbol that looks like a web page with a shield on it. if you hover over said symbol, it will say "Blocked Content"
When you click on this icon, you'll see "You're only seeing secure content" This is because some of the code used in the website is out of date and I guess newer standards don't like how it asks for permission to connect to things. Long story short, simply click on "See all content" and you will be able to once again use the formatting buttons on Menewsha.
Unlike Google Chrome or Firefox, it was my experience with Edge that as soon as I loaded a new page in the same tab (i.e. navigating from General Discussion to Charities Forum) that the shield icon would return and I would once again need to click on "See all content" to re enable formatting buttons. Chrome and Firefox is a onetime click for the current tab you are working in. Open a new tab and you will need to click it again.
Full disclosure, this takes you from an HTTPS connection to an HTTP connection, meaning your connection is no longer "Secure" this means that if someone wanted to, they might be able to get sensitive information you might post. Basically don't post your credit card info on here lol. Best not to do that anyways XD.
I neither encourage or discourage the use of this option to gain access to the original functionality of the website. I post this information as a way to get around the borkage and it's up to you to decide if you want to use it or not.
I load the unsafe scripts anyways when I use the site but it is my own personal choice.