feat(jui): add beacon screen

Minecraft.Client/UI/BeaconCancelButton.cpp

@@ -0,0 +1,25 @@
+#include "../../Platform/stdafx.h"
+#include "BeaconCancelButton.h"
+#include "Screens/BeaconScreen.h"
+#include "../../../Minecraft.World/Headers/net.minecraft.locale.h"
+
+// 4jcraft: referenced from MCP 8.11 (JE 1.6.4)
+#ifdef ENABLE_JAVA_GUIS
+extern ResourceLocation GUI_BEACON_LOCATION;
+#endif
+
+BeaconCancelButton::BeaconCancelButton(BeaconScreen* screen, int id, int x,
+                                       int y)
+    : AbstractBeaconButton(id, x, y) {
+    this->screen = screen;
+#ifdef ENABLE_JAVA_GUIS
+    this->iconRes = &GUI_BEACON_LOCATION;
+#endif
+    this->iconU = 112;
+    this->iconV = 220;
+}
+
+void BeaconCancelButton::renderTooltip(int xm, int ym) {
+    screen->renderTooltip(Language::getInstance()->getElement(L"gui.cancel"),
+                          xm, ym);
+}