Load *.desktop files recursively in wxMimeTypesManager under Unix.

Not all .desktop files are directly under /usr/share/applications, some or, in
some cases, most of them, may be under its subdirectories, so look for them
there as well.

See #16703.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78240 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/mimetype.cpp

@@ -229,11 +229,7 @@ void wxMimeTypesManagerImpl::LoadXDGAppsFilesFromDir(const wxString& dirname)
         cont = dir.GetNext(&filename);
     }
 
-#if 0
-    // RR: I'm not sure this makes any sense. On my system we'll just
-    //     scan the YAST2 and other useless directories
-
-    // Look recursively into subdirs
+    // Recurse into subdirs, which on KDE may hold most of the .desktop files
     cont = dir.GetFirst(&filename, wxEmptyString, wxDIR_DIRS);
     while (cont)
     {
@@ -242,7 +238,6 @@ void wxMimeTypesManagerImpl::LoadXDGAppsFilesFromDir(const wxString& dirname)
         LoadXDGAppsFilesFromDir( p.GetPath() );
         cont = dir.GetNext(&filename);
     }
-#endif
 }