Explicitly set color to primary on v-switch

Vuetify 2 did this by default, but Vuetify 3 does not.

Author: mvandenburgh

web/src/components/DandisetsPage.vue

@@ -25,6 +25,7 @@
               label="Drafts"
               density="compact"
               class="mx-2"
+              color="primary"
             />
           </v-list-item>
           <v-list-item>
@@ -33,6 +34,7 @@
               label="Empty Dandisets"
               density="compact"
               class="mx-2"
+              color="primary"
             />
           </v-list-item>
         </v-list>