[Bug Report] Incorrect icons vertical align in two-line list group

[Darkside73]

Environment

Vuetify Version: 2.0.5
Vue Version: 2.6.10
Browsers: Chrome 76.0.3809.87
OS: Linux x86_64

Steps to reproduce

Open reproduction link

Expected Behavior

Prepend icon and chevron-down icon are vertical aligned to the center

Actual Behavior

Prepend icon and chevron-down icon are vertical aligned to the top

Reproduction Link

https://codepen.io/anon/pen/wVyKgw

Other comments

VListGroup missed two-line prop

[johnleider]

The prepend-icon is not supposed to be center aligned per spec: https://material.io/design/components/lists.html#specs

The only reason it is in your first example is that you are using v-list-item-action instead of v-list-item-icon.