Code review comment for lp:~dashua/light-themes/border-less.metacity.and.fixes

Bug #733431 was marked as Fix Committed in Unity 2D because the bug "Windows lack borders: visually unpleasant and leaves only one option to resize" was fixed. The fix was simply the revert to 1px borders in light-themes.

Making borders 0px again will reopen this very same bug.