Add ContactListCellFactory

- Refactor chatList to userList in ContactSearchScene and
  GroupCreationScene
- Narrow contact searches down to users on a datamodel basis
- Refactor ContactSearchRequest and ContactSearchResult to
  UserSearchRequest and UserSearchResult

common/src/main/java/envoy/event/contact/ContactSearchRequest.java

@@ -1,26 +0,0 @@
-package envoy.event.contact;
-
-import envoy.event.Event;
-
-/**
- * Requests a contact search from the server.<br>
- * <br>
- * Project: <strong>envoy-common</strong><br>
- * File: <strong>ContactSearchRequest.java</strong><br>
- * Created: <strong>05.02.2020</strong><br>
- *
- * @author Maximilian K&auml;fer
- * @since Envoy Common v0.2-alpha
- */
-public class ContactSearchRequest extends Event<String> {
-
-	private static final long serialVersionUID = 0L;
-
-	/**
-	 * Initializes a {@link ContactSearchRequest}.
-	 *
-	 * @param searchPhrase the search phrase to use in the contact search
-	 * @since Envoy Common v0.2-alpha
-	 */
-	public ContactSearchRequest(String searchPhrase) { super(searchPhrase); }
-}

common/src/main/java/envoy/event/contact/UserSearchRequest.java

@@ -0,0 +1,26 @@
+package envoy.event.contact;
+
+import envoy.event.Event;
+
+/**
+ * Requests a user search from the server.
+ * <p>
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>UserSearchRequest.java</strong><br>
+ * Created: <strong>05.02.2020</strong><br>
+ *
+ * @author Maximilian K&auml;fer
+ * @since Envoy Common v0.2-alpha
+ */
+public class UserSearchRequest extends Event<String> {
+
+	private static final long serialVersionUID = 0L;
+
+	/**
+	 * Initializes a {@link UserSearchRequest}.
+	 *
+	 * @param searchPhrase the search phrase to use in the user search
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public UserSearchRequest(String searchPhrase) { super(searchPhrase); }
+}

common/src/main/java/envoy/event/contact/UserSearchResult.java

@@ -2,28 +2,28 @@ package envoy.event.contact;
 
 import java.util.List;
 
-import envoy.data.Contact;
+import envoy.data.User;
 import envoy.event.Event;
 
 /**
- * Contains a list of {@link Contact}s for which a search was performed.<br>
- * <br>
+ * Contains a list of users for which a search has been requested.
+ * <p>
  * Project: <strong>envoy-common</strong><br>
- * File: <strong>ContactSearchResult.java</strong><br>
+ * File: <strong>UserSearchResult.java</strong><br>
  * Created: <strong>11 Feb 2020</strong><br>
  *
  * @author Kai S. K. Engelbart
  * @since Envoy Common v0.2-alpha
  */
-public class ContactSearchResult extends Event<List<Contact>> {
+public class UserSearchResult extends Event<List<User>> {
 
 	private static final long serialVersionUID = 0L;
 
 	/**
-	 * Creates an instance of {@link ContactSearchResult}.
+	 * Creates an instance of {@link UserSearchResult}.
 	 *
 	 * @param users the users found during the search
 	 * @since Envoy Common v0.2-alpha
 	 */
-	public ContactSearchResult(List<Contact> users) { super(users); }
+	public UserSearchResult(List<User> users) { super(users); }
 }