[OE-4363] - migration fix
[OE-4388] - added admin page for Element Attributes
[OE-4356] Hide the clear button if there are no readings
Fix import.
[OE-4405] Loader for virtual clinic form.
+ fixed relation rule to firm
[OE-4409] Force validation on the diagoses element, even if no diagosis has been added.

Also fixed some namespacing issues.
Merge branch 'release/1.7' of github.com:openeyes/OphCiExamination into release/1.7
+ [OE-4429] remove unnecessary override for child open elements
[OE-4307] fixed rendering bug for old records on test instance
Merge branch 'release/1.7' of https://github.com/openeyes/OphCiExamination into release/1.7
Fix case error
+ [OE-4397] default to single queue when only one configured
+ [OE-4397] fix validation when not refering to virtual clinic
+ [OE-4397] fix saving when not refering to virtual clinic
[OE-4423] current management plan version table fix
+ [OE-4439] fix the va unit changing now that it's a child element
+ [OE-4437] fix validation on visual function and on VA.
[OE-4367] - added 6/6 as visual acuity reading default for all scales.
[OE-4388] - fix loading bug