Split system names into first / last.

app/src/main/java/org/thoughtcrime/securesms/profiles/ProfileName.java

@@ -89,6 +89,13 @@ public final class ProfileName implements Parcelable {
     }
   }
 
+  /**
+   * Creates a profile name that only contains a given name.
+   */
+  public static @NonNull ProfileName asGiven(@Nullable String givenName) {
+    return fromParts(givenName, null);
+  }
+
   /**
    * Creates a profile name, trimming chars until it fits the limits.
    */

app/src/main/java/org/thoughtcrime/securesms/profiles/edit/EditGroupProfileRepository.java

@@ -74,7 +74,7 @@ class EditGroupProfileRepository implements EditProfileRepository {
                               String title = groupRecord.getTitle();
                               return title == null ? "" : title;
                             })
-                            .or(() -> recipient.getName(context));
+                            .or(() -> recipient.getGroupName(context));
     }, nameConsumer::accept);
   }