Hotfix/2.1.15/numeric input step

[tiller1010]

https://werkbotstudios.teamwork.com/app/tasks/34997511

Summary

• code styles in form.js
• respect step attribute for numeric field buttons
• respect min and max attributes for numeric field buttons

Testing Steps

• test with the xmc calculator (you may want to set a max on the NumericField in CalculatorPageController) https://github.com/werkbot/xmc/pull/52
• confirm the step attribute is respected, should increment by 5
• confirm the min and max attributes are respected

Git Flow

• DO NOT delete "release/*" or "hotfix/*" branches after merging a PR. These are used to publish the next release, and they are deleted automatically.
• "Squash and merge" is good on "feature/*" into "develop"
• "Create a merge commit" is good on "release/*" or "hotfix/*" into "main"
• With npm repositories, the version number must be incremented manually, before merging the release.

[aletail]

Great work!