file-menu:between-open-and-revert in drscheme:frame:basics-mixin

This method is called between the addition of the open menu-item and before the addition of the revert menu-item to the file-menu menu. Override it to add additional menus at that point.

• (send a-drscheme:frame:basics-mixin file-menu:between-open-and-revert file-menu void
     file-menu : (is-a?/c menu%)

  Adds an Install .plt File... menu item, which downloads and installs .plt files from the web, or installs them from the local disk. After that, calls the super method.