LineChart widget

[digitronik]

Need to move LineChart widget form MangeIQ local[0] to Patternfly[1].

I found widget not that much mature, Need to refactor code and fallow WT.core guidelines.

[0] https://github.com/ManageIQ/integration_tests/blob/master/widgetastic_manageiq/__init__.py#L4005
[1] https://www.patternfly.org/pattern-library/data-visualization/line-chart/

[digitronik]

Extending scope for other data visualization widgets in patternfly...

1. Sparkline
2. Line Chart
   single line
   line chart
   single spline chart
   spline chart
3. Bar Chart
   veritcal bar chart
   group vertical bar chart
   stacked vertical bar chart
   horizontal bar chart
   group horizontal bar chart
   stacked horizontal bar chart
4. Area Chart
   single area chart
   area chart
5. Pie Chart

[digitronik]

Please, don't close this issue... Pie charts are still in progress.