Inconsistent Edit button behaviour

[wizardist]

When we are in View action (action=view), clicking the Edit button leads to a code editor being opened without refreshing the page. When we want to go back (to the View), the page is refreshed.

When we click the Edit button on History page, nothing happens. (Actually, Chrome Debugger barks at some ace.js, but I'm too lazy to figure it out know). About leaving back to History, see above.

Also, try to click the Edit button once, and when the editor is loaded, click it once again. We'll see the code in the editor disappear!