Replace default export with named exports (#1998)

## Launch Checklist

See title,
Also removed some "_" from some file names.
This is a pure refactoring, no logic changes.


 - [x] Briefly describe the changes in this PR.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/components/InputFont.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import InputAutocomplete from "./InputAutocomplete";
+import { InputAutocomplete } from "./InputAutocomplete";
 
 export type InputFontProps = {
   name: string
@@ -11,7 +11,7 @@ export type InputFontProps = {
   "aria-label"?: string
 };
 
-export default class InputFont extends React.Component<InputFontProps> {
+export class InputFont extends React.Component<InputFontProps> {
   static defaultProps = {
     fonts: []
   };