Chip list (adding multiple values to a list): add elements on comma and focus loss #494

The issue is with this component:

At the moment, to add a value, a user has to press Enter and for many people this is not obvious. To make things more straightforward, this component should support 2 additional features:

• a value should be added, when a user types comma. To have a possibility to use comma in values, escaped commas should be allowed (e.g. abc,def should add a single value of abc,def)
• a value should be added, when a user goes to another component (changes focus). For example, when he presses a save button