VueUiXy :
- Added new config option to customize period spacing for bar types when multiple series are used. See the issue which triggered this change.
Spacing can be customized using config.bar.periodGap, accepting a number between 0 and 1, and set by default to 0.1.
This option has no effect when individual scale + stack modes are enabled, as bar series each take a full period slot in this case.