Unnecessary count operations in Data Browser

[dplewis]

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest versions of Parse Server and Parse Dashboard.

Issue Description

Count operations are very expensive and are run every time the data browser changes classes.

https://github.com/parse-community/parse-dashboard/blob/alpha/src/dashboard/Data/Browser/Browser.react.js#L176

Steps to reproduce

Inspect element on your browser and load the page. The count operations run for every class. Switching classes will also run count operations (easier to notice on classes with a lot of objects).

Actual Outcome

Count runs once the page loads and every change between classes.

Expected Outcome

Run count only once when the page loads

Environment

Dashboard

• Parse Dashboard version: 4.1.4
• Browser (Safari, Chrome, Firefox, Edge, etc.): Chrome
• Browser version: 103.0.5060.134

Server

• Parse Server version: 4.1.2
• Operating system: Mac
• Local or remote host (AWS, Azure, Google Cloud, Heroku, Digital Ocean, etc): local

Database

• System (MongoDB or Postgres): Mongo
• Database version: 4.2
• Local or remote host (MongoDB Atlas, mLab, AWS, Azure, Google Cloud, etc): Atlas

Logs

[parse-github-assistant]

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[mtrezza]

Closing via #2250