Fix text colour being wrong in Safari

[danielcompton]

Safari renders the text on the ? and "Clipboard now contains..." in a dark colour instead of white. It looks like this is the colour from the body. Trying to override it with styles on the elements doesn't work. I think this is related to all: unset as things seem to work better when that is disabled. Firefox and Chrome don't show this issue.

I'm not really sure where to go with this, maybe it's a bug in Safari? Not really sure. Any help appreciated.