Apply suggestions from code review

Co-authored-by: CyB3RC0nN0R <kske@outlook.de>

client/src/main/java/envoy/client/data/Chat.java

@@ -7,9 +7,10 @@ import java.util.List;
 import java.util.Objects;
 
 import envoy.client.net.WriteProxy;
-import envoy.data.*;
+import envoy.data.Contact;
+import envoy.data.Message;
 import envoy.data.Message.MessageStatus;
-import envoy.event.IsWriting;
+import envoy.data.User;
 import envoy.event.MessageStatusChange;
 
 /**
@@ -33,8 +34,7 @@ public class Chat implements Serializable {
 	protected int unreadAmount;
 
 	/**
-	 * Counts the milliseconds until another {@link IsWriting} event will be sent if
-	 * something is typed.
+	 * Stores the last time an {@link envoy.event.IsWriting} event has been sent.
 	 */
 	protected transient long lastWritingEvent;
 
@@ -145,19 +145,8 @@ public class Chat implements Serializable {
 	public Contact getRecipient() { return recipient; }
 
 	/**
-	 * @return whether this {@link Chat} points at a {@link User}
-	 * @since Envoy Client v0.1-beta
-	 */
-	public boolean isUserChat() { return recipient instanceof User; }
-
-	/**
-	 * @return whether this {@link Chat} points at a {@link Group}
-	 * @since Envoy Client v0.1-beta
-	 */
-	public boolean isGroupChat() { return recipient instanceof Group; }
-
-	/**
-	 * @return the last known time a {@link IsWriting} event has been sent
+	 * @return the last known time a {@link envoy.event.IsWriting} event has been
+	 *         sent
 	 * @since Envoy Client v0.2-beta
 	 */
 	public long getLastWritingEvent() { return lastWritingEvent; }

client/src/main/java/envoy/client/ui/listcell/ChatControl.java

@@ -31,7 +31,7 @@ public class ChatControl extends HBox {
 
 		// Unread messages
 		if (chat.getUnreadAmount() != 0) {
-			final Region spacing = new Region();
+			final var spacing = new Region();
 			setHgrow(spacing, Priority.ALWAYS);
 			getChildren().add(spacing);
 			final var unreadMessagesLabel = new Label(Integer.toString(chat.getUnreadAmount()));