Function menu

TheForceEngine/TFE_Editor/LevelEditor/levelEditor.cpp:1743–1976

	}

	bool menu()
	{
		bool menuActive = false;
		if (ImGui::BeginMenu("Level"))
		{
			menuActive = true;
			if (ImGui::MenuItem("Help / Manual", NULL, (bool*)NULL))
			{
				// TODO - replace with TFE editor link.
				osShellOpenUrl("https://df-21.net/wiki/?title=TFE-EDITOR");
			}
			ImGui::Separator();

			// Disable Save/Backup when there is no project.
			bool projectActive = project_get()->active;
			if (!projectActive) { disableNextItem(); }
			{
				if (ImGui::MenuItem("New", NULL, (bool*)NULL))
				{
					setPopupEndCallback(edit_newLevel);
					openEditorPopup(POPUP_NEW_LEVEL);
				}
				if (ImGui::MenuItem("Import", NULL, (bool*)NULL))
				{

				}
			}
			if (!projectActive) { enableNextItem(); }
			if (ImGui::MenuItem("Open", NULL, (bool*)NULL))
			{
				setPopupEndCallback(edit_openLevel);
				openEditorPopup(TFE_Editor::POPUP_BROWSE, TYPE_LEVEL, nullptr);

				// No project - Open Vanilla / Resources
				// Project - Prefer to open Project maps.
			}
			
			ImGui::Separator();

			if (!projectActive) { disableNextItem(); }
			{
				if (ImGui::MenuItem("Save", getShortcutKeyComboText(SHORTCUT_SAVE), (bool*)NULL))
				{
					saveLevel();
				}
				if (ImGui::MenuItem("Reload", getShortcutKeyComboText(SHORTCUT_RELOAD), (bool*)NULL))
				{
					openEditorPopup(POPUP_RELOAD_CONFIRM);
				}
				if (ImGui::MenuItem("Snapshots", nullptr, (bool*)NULL))
				{
					openEditorPopup(POPUP_SNAPSHOTS);
				}
			}
			if (!projectActive) { enableNextItem(); }

			if (ImGui::MenuItem("Close", NULL, (bool*)NULL))
			{