Local version warning has some usability issues

[fdb]

The initial commit for local version changes looks very good! There are some small issues I'd still like to see fixed:

• [x] Restore button sometimes overlays the "Save" button (see screenshot).
• [x] No extra confirm dialog when clicking the "Restore" button
• [x] Prompt sounds weird on the blank sketch page
• [x] Prompt sounds like somebody else has made the changes instead of the user.
• [x] Still gives the warning even if the source code is identical (e.g. accidentally typing a letter and deleting it)

[fdb]

It seems the element is now styled using position: fixed. It would be better — from a layout perspective — to move it up to the header level, and put it together with the Save button.