Move "Copy to Clipboard" action to a nice visible button
Right now it's possible to copy the text on a page that's based on CommandOutputKCM, but this is hidden because the action only lives in a context menu when you right-click on the view.
This commit fixes that by moving the action to a nice big visually obvious button on the footer. This should make the action discoverable--enough that we can remove the single-item context menu that previously held the action.
