Pan to and highlight node when search result clicked or hovered

[bergie]

With #36 we now have a search box in the UI which is able to search nodes in the graph and components in the library.

When user hovers over (or maybe moves to via up and down keys) or clicks a node in the search results, the graph view should pan so that the node comes into the visible area, and highlight the node.

[d4tocchini]

SearchResultsCard ROLLOVERNODE -> SHOWCASENODE Graph