Disable download button when downloading

src/types/DownloadProgress.ts

@@ -1,9 +1,9 @@
-import { LauncherVersion } from "./LauncherVersion";
+import { LauncherVersion } from './LauncherVersion'
 
 export class DownloadProgress {
-  constructor(
+  constructor (
     public version: LauncherVersion,
     public progress: number,
     public done: boolean
   ) {}
-}
+}