Sentence case "Package name"

src/locales/en.json

@@ -308,7 +308,7 @@
       "string": "Application Settings"
     },
     "packageName": {
-      "string": "Package Name"
+      "string": "Package name"
     },
     "packageNameHelp": {
       "string": "Package name should be a unique name used only by your application. The same project should always have the same package name."