Port WebAppListWindow to Diorite.ApplicationWindow

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Port WebAppWindow to Diorite.ApplicationWindow

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Don't overwrite appmenu

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>