Code review comment for lp:~mandel/desktopcouch/fix_bug_519873

The empty restriction is coming from the RecordData class that does not allow to add empty lists so we do not allow to add them and then delete all its contents. I know there is a bug files regarding this (https://bugs.launchpad.net/desktopcouch/+bug/510232) maybe fixing that bug and then merging this branch without the last pop and remove check is a better idea.