feat(client): Implement default upload folder setting

Resolve #5985

src/client/scripts/select-drive-file.ts

@@ -3,6 +3,7 @@ import DriveWindow from '../components/drive-window.vue';
 export function selectDriveFile($root: any, multiple) {
 	return new Promise((res, rej) => {
 		const w = $root.new(DriveWindow, {
+			type: 'file',
 			multiple
 		});
 		w.$once('selected', files => {