[Bug Report] v-icon x-small not working

[gorsat]

Versions and Environment

Vuetify: 2.0.0-beta.8
Vue: 2.6.10
Browsers: Chrome 75.0.3770.100
OS: Windows 10

Steps to reproduce

make v-icon with attr x-small

Expected Behavior

an icon is rendered at "extra small" size which is reasonably expected to be "less than the small size"

Actual Behavior

an icon is rendered at medium size (bigger than the small size)

Reproduction Link

https://codepen.io/OGCoder/pen/bXNVoZ

[KaelWD]

v-icon doesn't actually use the x-small prop, it's just inherited from a mixin created for v-btn. @vuetifyjs/core-team should this be added, or just removed from docs?

[jacekkarczmarczyk]

Seem natural to use x-small icon in x-small btn, also sizing props should be consistent withing the framework, not sure where these large/small props are used but all components having at least one of these props should have the others