Center loading icon vertically

Declare chart and control sizes in css so that they fit in the dashboard

Previous method using async: false was deprecated

Fixed bug where hour labels were showing despite data being daily

Number and content of labels now calculated by Google API

Cursor is now pointer on all buttons

Move styles for many objects to top of file

To match control height defined in initializeLineChart()

Previously would also display when itself was clicked

Tooltip displays on click

to match instructions in Google Charts

This reverts commit 076644d1.