Add menu to code editor, put "Format code" and "Convert to variable" buttons in it (#426)

* Move format code button to menu item
by extending CollapsiblePanel to take an optional
menu React element.

Signed-off-by: Frank Noirot <frank@kittycad.io>

* Style tweaks

* Add shortcuts for format and cmd bar to codemirror

* Move convert to variable into code menu

Signed off by Frank Noirot <frank@kittycad.io>

* Add keyboard shortcut to convert to variable

* Remove convert to variable from toolbar

* Refactor: move TextEditor to its own component

* Set a better convertToVar shortcut

* Style and ergonomic polish for convertToVar modal

* Use named constants for shortcuts 😇

* Try yet another keyboard shortcut

* Fix formatting

* remove isShiftDown from app.tsx

---------

Signed-off-by: Frank Noirot <frank@kittycad.io>
Co-authored-by: Kurt Hutten Irev-Dev <k.hutten@protonmail.ch>

src/Toolbar.tsx

@@ -8,7 +8,6 @@ import { EqualAngle } from './components/Toolbar/EqualAngle'
 import { Intersect } from './components/Toolbar/Intersect'
 import { SetHorzVertDistance } from './components/Toolbar/SetHorzVertDistance'
 import { SetAngleLength } from './components/Toolbar/setAngleLength'
-import { ConvertToVariable } from './components/Toolbar/ConvertVariable'
 import { SetAbsDistance } from './components/Toolbar/SetAbsDistance'
 import { SetAngleBetween } from './components/Toolbar/SetAngleBetween'
 import { Fragment, useEffect } from 'react'
@@ -164,7 +163,6 @@ export const Toolbar = () => {
               </button>
             )
           })}
-        <ConvertToVariable />
         <HorzVert horOrVert="horizontal" />
         <HorzVert horOrVert="vertical" />
         <EqualLength />