fix(cv-tabs): Fix error on parentNode on doScrollIntoView. #1269
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Contributes to close #1264
## What did you do?
Add a comprobation to know if the tab exists.
## Why did you do it?
There was an error when the users leave the page causing an undefined parentNode error.
How have you tested it?
Yes. Tested on a project I'm working on.
Were docs updated if needed?