FIX: BO Extration translation script

scripts/extract_translations.sh

@@ -2,11 +2,21 @@
 
 if [ -d node_modules/ng_backoffice ]; then
 	pushd node_modules/ng_backoffice
+
+	if [ -f node_modules/.bin/grunt ]; then
 		node_modules/.bin/grunt extract_translations
+	else
+		grunt extract_translations
+	fi
 fi
 
 
 if [ -d node_modules/ng_client ]; then
 	pushd node_modules/ng_client
+
+	if [ -f node_modules/.bin/grunt ]; then
 		node_modules/.bin/grunt extract_translations
+	else
+		grunt extract_translations
+	fi
 fi