title: Sublime Text: "Remove all Folders from Project" Keybinding
body: <p>I'm trying to add a keybinding for the menu item "Project > Remove all Folders from Project" in Sublime Text 2 but I can't find the correct command to use.</p>
  
  <p>For "Project > Add Folder to Project..." this worked fine:</p>
  
  <p><code>{ "keys": ["ctrl+shift+o"], "command": "prompt_add_folder" }</code></p>
  
  <p>I've looked in the commands list in <code>Packages/Default/Default.sublime-commands</code> but 'remove all folders from project' isn't listed there.</p>
  
  <p>I've tried things like</p>
  
  <p><code>{ "keys": ["ctrl+shift+r"], "command": "remove_all_folders_from_project" }</code><br>
  and<br>
  <code>{ "keys": ["ctrl+shift+r"], "command": "prompt_add_folder" }</code></p>
  
  <p>but no luck.</p>