Closes #728
Fixed issue of the close tab button disappearing when scrolling down the page by attaching it to the course search side panel and fixing it to the top left hand corner when the panel is closed. Kept the previously implemented burger-button animation.
Closes #728 Fixed issue of the close tab button disappearing when scrolling down the page by attaching it to the course search side panel and fixing it to the top left hand corner when the panel is closed. Kept the previously implemented burger-button animation.