Add scroll to top on navigation

[fzaninotto]

Problem

React-router doesn't manage scroll changes on navigation. As a consequence, when users click on an item low in the menu, or on the pagination controls, the new content may reveal up hidden in the non-visible area of the page. This is disturbing for end users.

On the other hand, the page should not scroll to top everywhere, and especially not when using the back button.

Solution

• Enable scroll to top by default in <List>, <Create>, <Edit> and <Show>
• Allow users to disable it using the disableScrollToTop prop
• Add documentation

[fzaninotto]

I'll take another approach based on adding a parameter to links rather than adding a watcher in pages. It'll be more flexible.