Fix index links sending you to the wrong page when advancements lock …

…sections

Also updates a couple of places assuming index is always unlocked/the first section. Probably a good assumption, but might as well be safe
See SlimeKnights/TinkersConstruct#4856

src/main/java/slimeknights/mantle/client/book/action/protocol/ProtocolGoToPage.java

@@ -11,7 +11,7 @@ public ProtocolGoToPage(boolean returner) {
 
   @Override
   public void processCommand(BookScreen book, String param) {
-    int pageNum = book.book.findPageNumber(param);
+    int pageNum = book.book.findPageNumber(param, book.advancementCache);
 
     if (pageNum >= 0) {
       book.openPage(pageNum, this.returner);

src/main/java/slimeknights/mantle/client/screen/book/BookScreen.java

@@ -305,7 +305,7 @@ protected void init() {
     }));
 
     this.indexArrow = this.addRenderableWidget(new ArrowButton(book, this.width / 2 - PAGE_WIDTH_UNSCALED - ArrowButton.WIDTH / 2, this.height / 2 - PAGE_HEIGHT_UNSCALED / 2, ArrowButton.ArrowType.BACK_UP, this.book.appearance.arrowColor, this.book.appearance.arrowColorHover, (p_212998_1_) -> {
-      this.openPage(this.book.findPageNumber("index.page1"));
+      this.openPage(this.book.findPageNumber("index.page1", this.advancementCache));
 
       this.oldPage = -2;
       this.buildPages();
@@ -341,7 +341,7 @@ public void tick() {
       this.previousArrow.x = this.width / 2 - 184;
       this.nextArrow.x = this.width / 2 + 165;
 
-      SectionData index = this.book.findSection("index");
+      SectionData index = this.book.findSection("index", this.advancementCache);
       this.indexArrow.visible = index != null && (this.page - 1) * 2 + 2 > index.getPageCount();
     }