Remove auto-scrolling of sidebar on pin hover.
Remove auto-scrolling of sidebar on pin hover.

This was added along with pin/sidebar highlighting in b71d042e,
but has proved distracting/confusing.

mhalden/fixmystreet,altinukshini/lokalizo,altinukshini/lokalizo,appstud/fixmystreet,appstud/fixmystreet,dracos/fixmystreet,mhalden/fixmystreet,appstud/fixmystreet,rbgdigital/fixmystreet,appstud/fixmystreet,rbgdigital/fixmystreet,mhalden/fixmystreet,dracos/fixmystreet,altinukshini/lokalizo,appstud/fixmystreet,altinukshini/lokalizo,appstud/fixmystreet,altinukshini/lokalizo,mhalden/fixmystreet,altinukshini/lokalizo,dracos/fixmystreet,appstud/fixmystreet,rbgdigital/fixmystreet,rbgdigital/fixmystreet,mhalden/fixmystreet,dracos/fixmystreet,mhalden/fixmystreet,dracos/fixmystreet,rbgdigital/fixmystreet,dracos/fixmystreet,rbgdigital/fixmystreet