Update examples for testing modules

examples/component/modal_dialog_custom.cpp

@@ -5,11 +5,16 @@
 #include <string>  // for string, basic_string, char_traits, operator+
 #include <vector>  // for vector
 
+#ifndef FTXUI_BUILD_MODULES
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
 #include "ftxui/component/component.hpp"  // for Button, Renderer, Horizontal, Tab
 #include "ftxui/component/component_base.hpp"      // for ComponentBase
 #include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
 #include "ftxui/dom/elements.hpp"  // for operator|, Element, filler, text, hbox, separator, center, vbox, bold, border, clear_under, dbox, size, GREATER_THAN, HEIGHT
+#else
+import ftxui.component;
+import ftxui.dom;
+#endif
 
 int main() {
   using namespace ftxui;