Fixed Issue #837 (accessibility hierarchy problem) (super small PR)

[artem-alexandrov]

Setting parent view as an accessible view prevents from finding siblings, so we need to turn it off if we want to use subviews.
This is crucial for the UI tests since I'm not able to check the message of this HUD if the defaultMaskType set not to none

[artem-alexandrov]

Anyone?

[honkmaster]

I can not judge this PR as I am not firm with the accessibility API. Someone else or do you have documentation about the "right" way?

[artem-alexandrov]

@honkmaster here is the documentation on this property - https://developer.apple.com/documentation/objectivec/nsobject/1615141-isaccessibilityelement
It says if view is a container for other elements which should be accessible, then this property should be false. This is what is needed here to access HUD element and check it's text in UI Tests.

[Selkie972]

I second the need to fix the accessibility hierarchy, it's painful to test normal errors such as email / password issues without the accessibility change