title: Using relative paths for Gnome launcher
body: <p>We're developing an app that needs to run on a removable device (e.g. USB stick). On Linux, we're using Gnome launchers to place a shortcut to the app on the root of the device. However, we need to use relative paths for the executable and icon since we don't know in advance where the device will mount. In the .desktop file I have something like:</p>
  
  <p>Exec=../myapp/myexecutable<br>
  Icon=../myapp/myicon.png</p>
  
  <p>Neither the executable or icon is found. I read the spec on icon lookup in .desktop files (http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#icon_lookup) but it didn't enlighten me.</p>
  
  <p>Is there a way to get launchers to use a relative path? If not, is there another approach to achieve what I want (i.e. a shortcut with an icon and an executable, specified using relative paths)?</p>