Create a validation to full stop in the beginning of class to avoid duplicated items in the JS

Problem/Motivation

In order to have consistence and safer we need to validate full-stop in the beginning of class for multiple items, for example .class-name. Because with that if the user put this, the class will be saved as .class-name but in the JS will be necessary another . to get this element

Steps to reproduce

Proposed resolution

Implement a validation to verify if this character is present in the begining of each class in the multiple field and send a message for users sying that isn't necessary

Remaining tasks

User interface changes

API changes

Data model changes