Fix keyboard shortcuts to use Control on Windows and Linux (#3620)

* Fix keyboard shortcuts to use Control instead of Meta on Windows and Linux

* Convert more tests to use Playwright built-in

src/hooks/usePlatform.ts

@@ -1,44 +1,11 @@
-import { isDesktop } from 'lib/isDesktop'
+import { Platform, platform } from 'lib/utils'
 import { useEffect, useState } from 'react'
 
-export type Platform = 'macos' | 'windows' | 'linux' | ''
-
 export default function usePlatform() {
   const [platformName, setPlatformName] = useState<Platform>('')
 
   useEffect(() => {
-    function getPlatform(): Platform {
-      const platform = window.electron.platform ?? ''
-      // https://nodejs.org/api/process.html#processplatform
-      switch (platform) {
-        case 'darwin':
-          return 'macos'
-        case 'win32':
-          return 'windows'
-        // We don't currently care to distinguish between these.
-        case 'android':
-        case 'freebsd':
-        case 'linux':
-        case 'openbsd':
-        case 'sunos':
-          return 'linux'
-        default:
-          console.error('Unknown platform:', platform)
-          return ''
-      }
-    }
-
-    if (isDesktop()) {
-      setPlatformName(getPlatform())
-    } else {
-      if (navigator.userAgent.indexOf('Mac') !== -1) {
-        setPlatformName('macos')
-      } else if (navigator.userAgent.indexOf('Win') !== -1) {
-        setPlatformName('windows')
-      } else if (navigator.userAgent.indexOf('Linux') !== -1) {
-        setPlatformName('linux')
-      }
-    }
+    setPlatformName(platform())
   }, [setPlatformName])
 
   return platformName