- Removed bad `}` in TimeSystemAxis.vue.
- Removed `.u-contents` from line 129 of ganttChart.e2e.spec.js.
- Removed `event-handle` element; not needed.
- Changed `__event-wrapper` to not set height explicitly; uses absolute positioning.
- Added :before element to event-wrapper for better hit area.
- Improved hover styling.
- $colorEvent* style constants added to theme constant SCSS files.