This is a nice parity issue that power users will appreciate (e.g. see https://www.mediawiki.org/w/index.php?title=Topic:Sc7lcyirk06zeve0&topic_showPostId=sc7lcyn9oteem9uw#flow-post-sc7lcyn9oteem9uw).

We should use the same one core uses. I believe these vary by platform, but have the same root character (e.g. s or p for save or preview).

VE is pretty good about doing this (though we'll have to customize it); they already have save.

However, this task is about wikitext.