[DrawerType3] Scrolling position after routing

[klyakh]

1. Open page with long content and scroll.
2. Navigate to other page with long content.

Problem: scrolling remains in old position from previous page.

Router's scrollBehavior doesn't work because scrolling happens inside DIV. Need to implement per-layout scrolling handler.

vuejs/vue-router#1187 - related discussion. There are some good example how to deal with the issue.