Remove everyything on uninstall; Fix uninstall shortcut
Remove everyything on uninstall; Fix uninstall shortcut

The uninstall shortcut was misconfigured in [Icons].
  Now it points to the correct .exe.

Changed some uninstall directives in [UninstallDelete].
  Basically, all the directives could be collapsed into a single command.
  If there is a reason to create a new directive for each subdirectory,
  it certainly is not clear to me.

Finally, removed the `uninsneveruninstall` option on the {app}/ka-lite/content
  directory. Downloaded content is now stored in the user's content root.

ruimalheiro/installers,benjaoming/installers,MCGallaspy/installers,mrpau/installers,mrpau/installers,learningequality/ka-lite-installers,MCGallaspy/installers,mrpau/installers,learningequality/ka-lite-installers,benjaoming/installers,learningequality/ka-lite-installers,MCGallaspy/installers,learningequality/installers,benjaoming/installers,ruimalheiro/installers,benjaoming/installers,MCGallaspy/installers,learningequality/installers,learningequality/installers,ruimalheiro/installers,mrpau/installers,ruimalheiro/installers,learningequality/ka-lite-installers,learningequality/installers