comments: fixes and additions

Signed-off-by: Oleg Verych <olecom@gmail.com>
small fixes: userman wes check; "ext"->"extjs" path in config

Signed-off-by: Oleg Verych <olecom@gmail.com>
sub_app_create: replace `Ext.syncRequire` with `Ext.require`

* big classes can now be loaded with more interactivity

Signed-off-by: Oleg Verych <olecom@gmail.com>