Set the X-Requested-With header on dav requests

This will make sure the server knows it is a webserver request.
Hence we can also use this when federation is disabled.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
Signed-off-by: npmbuildbot[bot] <npmbuildbot[bot]@users.noreply.github.com>

Author: rullzer

js/viewer-main.js

@@ -24,6 +24,9 @@ import webdav from 'webdav'
 import axios from '@nextcloud/axios'
 import { getRootPath, getToken, isPublic } from '../utils/davUtils'
 
+// Add this so the server knows it is an request from the browserg
+axios.defaults.headers['X-Requested-With'] = 'XMLHttpRequest'
+
 // force our axios
 const patcher = webdav.getPatcher()
 patcher.patch('request', axios)