Please use verbose_name in TreeMap visualization

[sandeeps74]

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• [X ] I have checked the superset logs for python stacktraces and included it here as text if any
• I have reproduced the issue with at least the latest released version of superset
• I have checked the issue tracker for the same issue and I haven't found one similar

Superset version

0.18.5

Expected results

Tree map chart top header shows metric names (ex: sum___packet_rate) instead of verbose name (Packet Rate)

Actual results

Treemap header shows sql/developer like string (sum__packet_rate). Verbose name display will be more user friendly.

Steps to reproduce

Create a database table with columns metric and packet_reate. Change sum__packet_rate verbose name to "Packet Rate". Create a TreeMap visualization, group by metric. The Chart header will show sum__packet_rate instead of "Packet Rate".

[mistercrunch]

Notice: this issue has been closed because it has been inactive for 270 days. Feel free to comment and request for this issue to be reopened.