fix(VBtn): allow stacked and block props to work together (#20162)

Co-authored-by: John Leider <[email protected]>

Author: RyouSY

packages/vuetify/src/components/VBtn/VBtn.sass

@@ -168,6 +168,9 @@
       .v-icon
         --v-icon-size-multiplier: #{calc(24/21)}
 
+      &.v-btn--block
+        min-width: 100%
+
   .v-btn__loader
     align-items: center
     display: flex