title: Can I add custom properties to TortoiseSVN's list of properties in Add Properties dialog?
body: <p>Our team is using some user-defined properties on our SVN repository. When I go to add a property to a file using TortoiseSVN, I right-click on the file and choose <code>TortoiseSVN / Properties</code>. I then click the <code>New...</code> button and get the <code>Add Properties</code> dialog. At the top of this dialog is a drop-down list of pre-defined properties labeled <code>Property name:</code>. The list includes properties such as <code>svn:needs-lock</code>, <code>svn:eol-style</code>, etc.</p>
  
  <p>Is there a way I can add a couple of my own custom properties to this list? I am using TortoiseSVN 1.6.2.</p>
  
  <p>I've googled this, and saw a proposed patch on the TortoiseSVN mailing list, but to my knowledge it hasn't been implemented. Thanks.</p>
  
  <p>Edit: I know I can manually type my custom properties into that box, but I'd like them to be saved for next time.</p>