[Bug Report] The loading prop doesn't work on v-selects with the solo prop

[stoked74]

Versions and Environment

Vuetify: v0.17.0-beta.1
Vue: v2.5.2
Browsers: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.75 Safari/537.36
OS: Mac OSX

Steps to reproduce

Create an async v-select with the solo prop and the loading prop. Set the loading prop to true.

Expected Behavior

I would expect the loader to still be visible even though this is a solo v-select. I think there's definitely a need/use case having solo v-selects operate asynchronously with a visible loader.

Actual Behavior

When the :loading prop is true the loader isn't visible on solo v-selects

Reproduction Link

https://codepen.io/smitchell/pen/NwGMvK?editors=1010

Other comments

I'm really not sure if this a bug or a feature request but I think the loader should operate consistently across all v-select variants.

[jacekkarczmarczyk]

Same for text fields
Simplified codepen: https://codepen.io/anon/pen/dZYjJN?editors=1010

[KaelWD]

#2273 would probably fix this

[johnleider]

Loaders for everyone!