Pinch to zoom

• Pinch to zoom added for the benefit of mobile device users
• Touch has been made somewhat less eager to open the More Info dialog. Doesn't happen on touch start but rather on tap. Otherwise pinch-to-zoom was somewhat of a nightmare.

Touch & blank screen problem

• Fix for Javscript Error in Log, blank screen - "Uncaught SyntaxError: Unexpected token '<'" (hopefully)
• Added 'tap' and 'touchstart' event for mobile devices. (Thank you @dennykorsukewitz!)
• Changed the colors of legends and sub legends. #DarkMode (Thank you @dennykorsukewitz!)