Improve performance by wrapping event handlers in useCallback in rjsf/core

[jimmycallin]

Reasons for making this change

Improve performance by wrapping event handlers in useCallback in rjsf/core

Checklist

• I'm updating documentation
  • I've checked the rendering of the Markdown text I've added
• I'm adding or updating code
  • I've added and/or updated tests. I've run npm run test:update to update snapshots, if needed.
  • I've updated docs if needed
  • I've updated the changelog with a description of the PR
• I'm adding a new feature
  • I've updated the playground with an example use of the feature

[heath-freenome]

Can you also update the templates directory? And perhaps the widgets and templates in all the themes (in other PRs)

[jimmycallin]

Can you also update the templates directory? And perhaps the widgets and templates in all the themes (in other PRs)

i only found one applicable file in the templates directory - BaseInputTemplate. please verify i didn't miss anything. :)

i'll see if i get around to update the themes as well.

[heath-freenome]

Can you also update the templates directory? And perhaps the widgets and templates in all the themes (in other PRs)

i only found one applicable file in the templates directory - BaseInputTemplate. please verify i didn't miss anything. :)

Looks good!

i'll see if i get around to update the themes as well.

That would be great!