Add PM Target Cycling to Chat History plugin

runelite-api/src/main/java/net/runelite/api/ScriptID.java

@@ -45,6 +45,24 @@ public final class ScriptID
 	 */
 	public static final int CHATBOX_INPUT = 96;
 
+	/**
+	 * Opens the Private Message chat interface
+	 *
+	 * Jagex refers to this script as {@code meslayer_mode6}
+	 * <ul>
+	 * <li> String Player to send private message to</li>
+	 * </ul>
+	 */
+	public static final int OPEN_PRIVATE_MESSAGE_INTERFACE = 107;
+
+	/**
+	 * Rebuilds the text input widget inside the chat interface
+	 * <ul>
+	 * <li> String Message Prefix. Only used inside the GE search interfaces
+	 * </ul>
+	 */
+	public static final int CHAT_TEXT_INPUT_REBUILD = 222;
+
 	/**
 	 * Layouts the bank widgets
 	 *

runelite-api/src/main/java/net/runelite/api/VarClientStr.java

@@ -36,6 +36,7 @@ public enum VarClientStr
 {
 	CHATBOX_TYPED_TEXT(1),
 	INPUT_TEXT(22),
+	PRIVATE_MESSAGE_TARGET(23),
 	RECENT_CLAN_CHAT(129);
 
 	private final int index;

runelite-api/src/main/java/net/runelite/api/vars/InputType.java

@@ -38,6 +38,7 @@ public enum InputType
 	RUNELITE_CHATBOX_PANEL(-3),
 	RUNELITE(-2),
 	NONE(0),
+	PRIVATE_MESSAGE(6),
 	SEARCH(11);
 
 	private final int type;