Remove pre-filled workaround for notch styling

[nicholaschiang]

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Right now (in @tutorbook/subject-select), I'm using a this.state.inputValueWorkaround field to ensure that the input value contains a non-breaking space (i.e. &nsbp; or \xa0) whenever there are subjects selected (i.e. when there are chips within the TextField).

Workaround below (in src/subject-select/lib/subject-select.tsx on line 87):

  /**
   * Workaround for styling the input as if it has content. If there are 
   * subjects selected (in the given `subjects` object), this will return a
   * string containing a space (`' '`) so that the `TextField` styles itself as
   * if it were filled.
   * @todo Ideally, remove this workaround. But instead, make the `&nsbp;` 
   * actually show up as a non-breaking space (i.e. nothing).
   * @see {@link https://github.com/jamesmfriedman/rmwc/issues/601}
   * @return {string} The input value (either `' '` or `''`).
   */
  getInputValue(
    subjects: { [subject: string]: boolean } = this.state.subjects,
  ): string {
    const selected = Object.values(subjects).reduce((a, b) => a || b, false);
    return selected ? '\xa0' : '';
  }

See this issue and this issue for more info on how I went about implementing our SubjectSelect component.

[nicholaschiang]

Fixed it but there's still a bug in @rmwc/textfield that we're waiting on.

See this issue.

[nicholaschiang]

This will stay open until these two issues are resolved by @jamesmfriedman:

• Prefilled TextFields aren't working when outlined
• Control whether or not to use native validation.