Hide phone_no error message immediately, when completed

[stanislawK]

Description:

Improve the way how imask works every where we use it: contact.component, organization-contact.component, and user-profile.component.
Docs: https://www.npmjs.com/package/angular-imask
It could be done by adding (complete)="onComplete()" to masked input, and blank onComplete() {} to script file, but it isn't the best solution probably.

Current behaviour:

After typing valid phone number user have to stroke key once more, or click, to hide error messages, if they appeared earlier.

Expected behaviour:

After typing valid phone number error messages should hide immediately.

Steps to reproduce:

-enter the organization contact form
-touch phone number field to raise error message
-write in valid phone number (nine digits)