Add descriptive statistics to data browser

[mtrezza]

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

Currently it's not possible to see descriptive statistics in the data browser. Instead, to calculate the sum of two fields they have to calculated manually, or the data has to be exported to processed.

Feature / Enhancement Description

Add a feature that:

• Allows to select cells in the data browser across rows and columns.
• Calculates and displays common descriptive statistics about the selected cells, like "Sum", "Mean", "p99".

Example Use Case

This should work similar to a spreadsheet program where cells can be selected and these statistics are displayed.

[parse-github-assistant]

Thanks for opening this issue!

• 🎉 We are excited about your ideas for improvement!

[parseplatformorg]

🎉 This change has been released in version 5.4.0-alpha.7

[mtrezza]

#2529 may have to be removed, due to #2530.

[mtrezza]

Closing as #2530 has been fixed, and #2529 does not need to be reverted.

[parseplatformorg]

🎉 This change has been released in version 6.0.0-beta.1

[parseplatformorg]

🎉 This change has been released in version 6.0.0