Fixed issues with new module system

core/src/gui/menu.cpp

@@ -0,0 +1,24 @@
+#include <gui/menu.h>
+
+Menu::Menu() {
+
+}
+
+void Menu::registerEntry(std::string name, void (*drawHandler)(void* ctx), void* ctx) {
+    MenuItem_t item;
+    item.drawHandler = drawHandler;
+    item.ctx = ctx;
+    items[name] = item;
+}
+
+void Menu::removeEntry(std::string name) {
+    items.erase(name);
+}
+
+void Menu::draw() {
+    MenuItem_t item;
+    for (std::string name : order) {
+        item = items[name];
+        item.drawHandler(item.ctx);
+    }
+}