Custom tab-sizing

I've been using the code blocks a lot recently and I think that being able to set your own tab-size would be really beneficial when writing code in Discord. Even if you're just copy-pasting already written code the tabbing sometimes gets messed up and you have to fix it, which would be way easier if we had the option to set our own tab-size.

For anyone not in-the-know, tab-sizing specifies how many blank spaces should be created when you click the tab button on your keyboard.