Ignore npm installed packages

Author: Piccirello

.gitignore

@@ -36,3 +36,7 @@ config.status
 src/icons/qbt-theme/build-icons/node_modules/
 src/icons/skin/build-icons/node_modules/
 src/icons/skin/build-icons/icons/*.png
+
+# Web UI tools
+node_modules
+package-lock.json