rs-client: refactoring (#1344)

* Rename some things to be more consistent everywhere

* rs-client: refactoring

* MenuAction -> MenuOpcode merge

runescape-client/src/main/java/ScriptEvent.java

@@ -21,7 +21,8 @@ public class ScriptEvent extends Node {
 	@Export("loginBoxCenter")
 	static int loginBoxCenter;
 	@ObfuscatedName("o")
-	static String field586;
+	@Export("operatingSystem")
+	static String operatingSystem;
 	@ObfuscatedName("q")
 	@Export("args")
 	Object[] args;
@@ -86,7 +87,7 @@ public class ScriptEvent extends Node {
 	int type;
 
 	public ScriptEvent() {
-		this.type = 76;
+		this.type = 0x4c;
 	}
 
 	@ObfuscatedName("q")