Sync bar and line charts togherter

[BeardieB]

Description

X axis of syncronized charts of type line and bar are not default aligned.
Hovering on a point of the line chart doesn't show the respective point on the bar chart, while the opposite do work.

Steps to Reproduce

1. Generate two syncronized charts (as per doc, unique chard.it, same chart.group and same yaxis.labels.minWidth), one of type bar and the other of type line
2. Give them two equal series of data to be sure you provide same x axis values
3. move the cursor on the line chart's points

Expected Behavior

Generated graphs x-axis values horizontally aligned.
Highlighting of the respective bar chart's point when a line chart's point is hovered.

Actual Behavior

Generated graphs x-axis values are unaligned.
No point of the chart of type bar get highlighted when a point on the chart of type line is hovered.

Screenshots

Reproduction Link

JSFiddle: https://jsfiddle.net/gvjad7br/1/
codepen: https://codepen.io/Andrea-Barba/pen/ExMZNdM