Width doesn't set through style property

[ashl1]

Seems, width set to undefined in https://github.com/TeamWertarbyte/material-ui-chip-input/blob/master/src/ChipInput.js#L312 if fullWidth isn't set.
I recommend to initialize structure with if statement instead of explicit using undefined with ternary operator. This prevent rewriting attributes defined in style property.
Another approach is to use style attributes as backup values, but this do impossible to use another extend. The best safe operation is not to initialize the object attribute with any (include undefined) value, as I write above.

[leMaik]

😮 Whoops... I didn't know that Object.assign({foo: 42}, {foo: undefined}) results in {foo: undefined}. I'll change this to an if structure, as you suggested, which will be more readable, too.

Edit: Same for marginTop and cursor.