title: Visual Studio removes props file definition from vcxproj file
body: <p>I created a Project Template <a href="https://docs.microsoft.com/en-us/visualstudio/ide/creating-project-and-item-templates?view=vs-2017" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/visualstudio/ide/creating-project-and-item-templates?view=vs-2017</a>
  Inside vcxproj I have props file definition:
   (left side of the image): 
  <a href="https://i.stack.imgur.com/IUq6s.png" rel="nofollow noreferrer">props in vcxproj </a></p>
  
  <p>The prop file is present in the project package.
  When creating a New Project the line with prop file definition is deleted from vcxproj by Visual Studio.
  When I restored it manually and reload project everything works fine. 
  What can be the reason Visual Studio is doing that?</p>