fix visibility after adding contact, and some messaging

src/views/StartView.vue

@@ -44,14 +44,14 @@
         @click="onClickNo()"
         class="block w-full text-center text-md uppercase bg-slate-500 text-white px-1.5 py-2 rounded-md mt-2"
       >
-        No
+        No, I have a seed
       </a>
       <a
         v-if="numAccounts > 0"
         @click="onClickDerive()"
         class="block w-full text-center text-md uppercase bg-slate-500 text-white px-1.5 py-2 rounded-md mt-2"
       >
-        Derive New Address from Seed Imported Previously
+        Derive new address from existing seed
       </a>
     </div>
   </section>