Export: Added instructions for enabling script in config
Moved the Highmaps logic for overlapping data labels out to a module that can be reused in Highcharts.
Fixed #3652, minor grid lines sometimes rendering outside the plot area to the right.
Fixed #3654, millisecond ticks not placed correctly
Follow-up to #3519, markers were not clipped outside X axis.
Merge remote-tracking branch 'upstream/master'