Remove Warning "You have unsaved changes" even when nothing is changed

Problem/Motivation

When you switch to "Layout" on a node, do nothing, switch to "View" and then again switch to "Layout" yout get a message: "You have unsaved changes.". This is confusing for site builders, pretending you have changed something (and perhaps didn't realize it).

Proposed resolution

I can image its hard to diff the changes of an laoyut-editing, so perhaps its better to remove the warning.