Make HaikuDepot the preferred app for .hpkg files.

Note that double clicking a .hpkg in one of the packages folders will
not yet have a sensible result. I think it should open the regular
HaikuDepot with the full packages list, default to show installed packages
only and pre-select the package that was double clicked. It would be tricky
however if more than one installed package file is opened at once.

src/data/mime_db/application/x-vnd.haiku-package

@@ -9,8 +9,7 @@ resource(3, "META:L:DESC") #'MLDC' "Haiku software package file";
 
 resource(4, "META:SNIFF_RULE") "0.60 (\"hpkg\")";
 
-// TODO: That should be the package manager.
-//resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.Haiku-Expander";
+resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.Haiku-HaikuDepot";
 
 resource(6, "META:EXTENS") message(234) {
 	"extensions" = "hpkg",