spellbook: bugfixes/improvements (#1427)

* Add InterfaceTab enum, remove duplicate varbit

* Add widget.containsMouse rs-api method, sort scriptids, add various wids

* Refactor/improve/fix spellbook

I even made everything I could final to please goban

* Fix bugs/cleanup/improvements

* Update SpellbookPlugin.java

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

@@ -27,8 +27,8 @@ public class ScriptEvent extends Node {
 	@Export("args")
 	Object[] args;
 	@ObfuscatedName("w")
-	@Export("boolean1")
-	boolean boolean1;
+	@Export("isMouseInputEvent")
+	boolean isMouseInputEvent;
 	@ObfuscatedName("e")
 	@ObfuscatedSignature(
 		signature = "Lhj;"