Convert Tooltip Manager

[MKHenson]

The tooltip manager is reliant on the old Component system and does not work with the switch to React. We need to convert it to React. Instead of having a global manager for tooltips, it makes more sense to allow individual components to define their own tooltips. To do this, we can create a new tooltip react Component which wraps content and displays itself when the mouse enters the area. Similar to something like this: http://styleguide.cfapps.io/react_base_tooltips.html

[MKHenson]

We can close this once the tooltip manager has been removed

[MKHenson]

Previous Tooltip manager has now been removed and converted to TSX