First version for dragging into collections

Tasks done:

1) Removed opacity stuffs
2) Drag&drop available in all pages
3) Added drag into collections

Please pay attention in dragdrop.js:

```js
function sendEvmeDropApp(origin, entryPoint) {
    window.dispatchEvent(new CustomEvent('EvmeDropApp', {
      'detail': {
        'app': {
          'id': origin,
          'entryPoint': entryPoint
        },
        'collection': {
          'id': overlapElem.dataset.collectionId
        }
      }
    }));
  }
```

Here you can see that you receive:
* id: the app or bookmark origin (current implementation)
* entryPoint: the entry point to the app if it makes sense (only dialer and contacts apps)

You have to implement this because when I drag the dialer or contacts app into a collection, a new app called communications is appended in the collection instead of correct one

Thanks guys