Encode Requesttoken for avatars

Fixes new avatar selection in master half, other half will work when https://github.com/owncloud/core/pull/14266 has get merged.

Shocking to see how much places in our code do it wrong 

settings/js/personal.js

@@ -110,7 +110,7 @@ function showAvatarCropper () {
 	var $cropperImage = $('#cropper img');
 
 	$cropperImage.attr('src',
-		OC.generateUrl('/avatar/tmp') + '?requesttoken=' + oc_requesttoken + '#' + Math.floor(Math.random() * 1000));
+		OC.generateUrl('/avatar/tmp') + '?requesttoken=' + encodeURIComponent(oc_requesttoken) + '#' + Math.floor(Math.random() * 1000));
 
 	// Looks weird, but on('load', ...) doesn't work in IE8
 	$cropperImage.ready(function () {
@@ -311,7 +311,7 @@ $(document).ready(function () {
 	var url = OC.generateUrl(
 		'/avatar/{user}/{size}',
 		{user: OC.currentUser, size: 1}
-	) + '?requesttoken=' + oc_requesttoken;
+	) + '?requesttoken=' + encodeURIComponent(oc_requesttoken);
 	$.get(url, function (result) {
 		if (typeof(result) === 'object') {
 			$('#removeavatar').hide();