* In browsers that support it, we now tell it to copy exactly what was selected
in the DOM, and not to add extra gunk which browsers do to preserve exact
styling if pasted into another document.
* Don't use the clipboard APIs with MS Edge, since it only supports plain text.
If we let it fallback to the browser implementation it will insert HTML.
Safari very rarely has a text/html version (even if you copy from within
Safari!) so you end up always pasting plain text. Better to use the fallback
method to grab the data.
