Incubator-superset: Please add line-bar type graph to visualisations list

[rajat1428]

Now a days a lot of visualisation happen on line-bar chart together in one chart.
Please add this type of graph.
Thanks in advance

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[thunter009]

Please see my comment on similar request here.

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This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. For admin, please label this issue .pinned to prevent stale bot from closing the issue.