Vuetify: [Bug Report] select with header property

[ziaxdk]

Versions and Environment

Vuetify: 1.0.18
Vue: 2.5.16
Browsers: Chrome 66.0.3359.181
OS: Windows 10

Steps to reproduce

Add an items property to data with a header property name

Expected Behavior

select to work correctly

Actual Behavior

select doesn't add hover and select doesn't work

Reproduction Link

https://codesandbox.io/s/9ovxq5p0q4

Other comments

When binding to complex object with a 'header' property, the select component doesn't work

[KaelWD]

This is working as intended, the header property indicates that the item is a header. We should probably make this configurable though like with text, value, disabled, and avatar.