fix(components): Make preventDefault call in HandleKeypress opt-in

[mcous]

overview

Previously, <HandleKeypress> would call event.preventDefault if the keypress event matched one of its handlers. This is necessary functionality for its current use in the app (to prevent jog step size radio button shenanigans on arrow key presses), but should've been configurable. This PR makes the prevent default functionality opt-in.

Closes #1764

changelog

• fix(components): Make preventDefault call in HandleKeypress opt-in

review requests

• HandleKeypress in Styleguide doesn't let you type q/w/e keys in code blocks #1764 is actually fixed (i.e. you can type q, w, and e into code blocks)
• Step size radio selection does not change on arrow key press in app's jog controls

[Kadee80]

🌃 🌆