Vuetify: [Bug Report] V-Text-Field Disabled Border Color With Outline Prop

[185driver]

Versions and Environment

Vuetify: 1.2.3
Vue: 2.5.17
Browsers: Chrome
OS: Windows 10

Steps to reproduce

1. Click the 'Toggle Disabled Attribute' button to toggle the disabled attribute on the three v-text-fields.
2. Note that the middle input with the outline prop doesn't get any border color change on disabled.

Expected Behavior

For consistency with other disabled css changes on v-text-field elements, it would be nice to see the border color update for the outline version too.

Actual Behavior

No border color change occurs when disabled attribute is used with v-text-fields having an outline prop.

Reproduction Link

https://codepen.io/185driver/pen/qMMZwx

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I've added a css class to the pen showing what I believe the border color should change to, based on the color vuetify uses for other elements when they have a disabled prop. Toggling the second button will add the effect I'm proposing to the middle v-text-field element when it's disabled via the first button.

[jacekkarczmarczyk]

Also width of invactive field's border should be changed