Use ember bind-attr to change class on scroll rather than adding class
through js.
[GLOBAL-91] Use ember functions to handle the hide/show of info during
compound pharma scroll
move hide/show code in to the didScroll function defined in the view.
clean up unused code and format
move hide/show of target pharma info box to ember function inside
controller
remove the spinner from target pharma when using back/forward browser
buttons
Merge branch 'ian_global_91' into develop