strips extra hiphens from channel url

web/react/utils/utils.jsx

@@ -20,6 +20,7 @@ export function isEmail(email) {
 
 export function cleanUpUrlable(input) {
     var cleaned = input.trim().replace(/-/g, ' ').replace(/[^\w\s]/gi, '').toLowerCase().replace(/\s/g, '-');
+    cleaned = cleaned.replace(/-{2,}/, '-');
     cleaned = cleaned.replace(/^\-+/, '');
     cleaned = cleaned.replace(/\-+$/, '');
     return cleaned;