Remove packItems from reprioritizeItem, resizeItem, etc

[warpech]

Currently most methods of https://github.com/Juicy/juicy-tile-list/blob/gh-pages/src/package.js call packItems() at the end. This is not very useful anymore, because method packItems does not rerender DOM (I have to manually call <juicy-tile-list>.refresh() for that). Maybe packItems() call should be removed from these methods then?

[tomalec]

👍

The only thing that worries me is that then those methods called on <juicy-tile-list> will leave it in unstable state, as setup won't be reflected in DOM