title: In Eclipse, "Update Maven Dependencies" is disabled and greyed-out, why?
body: <p>I'm using Eclipse STS 2.7.1 and created a new Spring Template/MVC project. I deleted the pom file and replaced it with one from another project that has all the dependencies I need. But when I attempt to update the dependencies, the menu option is disabled...why?</p>
  
  <p><img src="https://i.stack.imgur.com/7b5jb.jpg" alt="enter image description here"></p>