Code review comment for lp://qastaging/~elopio/ubuntu-ui-toolkit/fix1274240-gallery-textfield_helper

Because I added a focus.wait_for(True) on the write method, so it will only work on enabled textfields.
I thought that's ok, as we should never write on disabled textfields, and if we do it should fail anyway.

So, for this test on the disabled text field, we need to go one level lower than write, and call type so we avoid the focus.wait_for(True)

Let me know what you think about it.
Thanks for reviewing.