MXML completion should add > after / when closing element

[joshtynjala]

From @JimmyGot

would be nice to have the following: when typing / at the end of an MXML tag I'd like to get /> instead

[Harbs]

FYI, I installed https://marketplace.visualstudio.com/items?itemName=formulahendry.auto-close-tag and added mxml to the list of supported languages, and that works perfectly.