Using ScrollList#onCurrentItemChanged display positional information.
Adding a scrollbar to visually represent position in the virtual list.
Add ScrollBar UIComponent, based on the example provided in random_people
Specify expected HTML structure in comments
Stylistic fixes to ScrollBar.js to pass linting
Track ScrollBarSpec
Remove use of jQuery from ScrollBar.js
Update class description for ScrollBar
Bring in requestAnimationFrame
Add handling of scale changes
Merge branch 'master' of github.com:WebFilings/wf-uicomponents into BOOKS-3560
Rename parent parameter and remove unecessary verticalOffset parameter in ScrollBar
Define a constant MIN_HEIGHT in ScrollBar used to set the minimum height of the scrollbar
Update ScrollBar spec and documentation
Refactor ScrollBar to have less functionality within the constructor
Work on transitioning ScrollBar to a more OO style and switch from ScrollTo to ScrollToPosition
Update placeScrollBar function to more accurately asses the height of the effective viewport when the scale doesn't equal 1
Provide the correct parameters to layout.render in ScrolLlist#scrollToPosition
Move scale change handler outside of the constructor
Add additional test coverage to ScrollBar