Merge pull request #8088 from Adam-/xptracker-overall

xptracker: correct total xp per hour calculation

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

@@ -782,6 +782,13 @@ public interface Client extends GameEngine
 	 */
 	int getSkillExperience(Skill skill);
 
+	/**
+	 * Get the total experience of the player
+	 *
+	 * @return
+	 */
+	long getOverallExperience();
+
 	/**
 	 * Gets the game drawing mode.
 	 *