fix: remove input type from number field

[maribethb]

The basics

• I branched from develop
• My pull request is against develop
• My code follows the style guide
• I ran npm run format and npm run lint

The details

Resolves

Fixes an issue with number fields where the browser doesn't let you enter text https://groups.google.com/g/blockly/c/qksb1qT54Ds

This prevents you from entering hexadecimal numbers or Infinity

Proposed changes

Remove input type=number so that users can enter Infinity and hexadecimal values, including on mobile.

Alternatives Considered

Instead of using input type=number use inputMode=numeric. This provides a hint to mobile browsers to show a number keyboard but doesn't enforce the "no text" rule. However, on Android, the keyboard cannot be switched back to the alpha keyboard. There is no setting that matches "This input is normally a number, but still allow the user to type text" so it is simply not possible. See #1595 for more information.

https://css-tricks.com/everything-you-ever-wanted-to-know-about-inputmode/#aa-numeric

Behavior Before Change

• Can only enter numbers. any letters will not even be accepted by the browser to be passed to the validator and checked. this had the side effect of not allowing hex values, but also is a more confusing experience.

Behavior After Change

• Field lets you enter any text including letters and digits. If Number(val) returns NaN the value is considered invalid and the input will be red until corrected. This means you can enter hex values and after you finish editing they'll be converted to decimal. This is how it used to work before refactor: Use input type=number for field_number.ts #6845
• On mobile with modal inputs enabled (default) there is no change in behavior - we use window.prompt so this change is irrelevant
• On mobile (iOS and Android) with modal inputs disabled, you will get the standard keyboard and the same experience as desktop.

Reason for Changes

We need to allow Infinity

Test Coverage

Tested in browser stack on ios, android, and desktop

Documentation

Additional Information

[maribethb]

@BeksOmega ready for re-review