refactor: replace 'preact' with 'react' (#1048)

app/assets/javascripts/Components/DeallocateHandler/DeallocateHandler.tsx

@@ -0,0 +1,17 @@
+import { WebApplication } from '@/UIModels/Application'
+import { observer } from 'mobx-react-lite'
+import { FunctionComponent } from 'react'
+
+type Props = {
+  application: WebApplication
+}
+
+const DeallocateHandler: FunctionComponent<Props> = ({ application, children }) => {
+  if (application.dealloced) {
+    return null
+  }
+
+  return <>{children}</>
+}
+
+export default observer(DeallocateHandler)