fix visibility after adding contact, and some messaging

src/views/ContactsView.vue

@@ -628,6 +628,10 @@ export default class ContactsView extends Vue {
           message =
             "A contact with that DID is already in your contact list. Edit them directly below.";
         }
+        if (err.name === "ConstraintError") {
+          message +=
+            "Check that the contact doesn't conflict with any you already have.";
+        }
         this.$notify(
           {
             group: "alert",
@@ -782,7 +786,7 @@ export default class ContactsView extends Vue {
       (visibility
         ? "Are you sure you want to make your activity visible to them?"
         : "Are you sure you want to hide all your activity from them?");
-    if (visibilityPrompt && confirm(visibilityPrompt)) {
+    if (!visibilityPrompt || confirm(visibilityPrompt)) {
       const url =
         this.apiServer +
         "/api/report/" +
@@ -911,7 +915,7 @@ export default class ContactsView extends Vue {
   }
 
   private nameForContact(contact?: Contact, capitalize?: boolean): string {
-    return contact?.name || (capitalize ? "T" : "t") + "this unnamed user";
+    return contact?.name || (capitalize ? "T" : "t") + "his unnamed user";
   }
 
   async onClickAddGive(fromDid: string, toDid: string): Promise<void> {