fix(v-list): fixed spacing in mini drawer

when using a `v-list` inside of a `v-navigation-drawer` with the **mini-variant** prop, the
`v-list-group`'s icon was not being properly aligned

fixes #2746

src/stylus/components/_lists.styl

@@ -35,9 +35,6 @@ theme(list, "list")
  list-style-type: none
  padding: $list-top-padding 0 $list-bottom-padding
  transition: height .3s $transition.fast-out-slow-in
-
- li:not(.subheader)
- display: block
 
  .input-group
  margin: 0
@@ -225,6 +222,7 @@ theme(list, "list")
  align-items: center
  cursor: pointer
  display: flex
+ list-style-type: none
 
  > li:not(.list__group__header__prepend-icon):not(.list__group__header__append-icon)
  flex: 1 0 auto
@@ -277,4 +275,4 @@ theme(list, "list")
  pointer-events: none
 
  &--subheader
- padding-top: 0
+ padding-top: 0

src/stylus/components/_navigation-drawer.styl

@@ -60,6 +60,11 @@ theme(navigation-drawer, "navigation-drawer")
 
  &--mini-variant
  overflow: hidden
+
+ .list__group__header__prepend-icon
+ flex: 1 0 auto
+ justify-content: center
+ width: 100%
 
  .list__tile__action,
  .list__tile__avatar