fix build 2

Author: igagis

build/cmake/apps.cmake

@@ -79,4 +79,5 @@ ruis_declare_app(easing)
 ruis_declare_app(paint)
 ruis_declare_app(tabbed_book)
 ruis_declare_app(touch HAS_RESOURCES)
+ruis_declare_app(widget_set)
 ruis_declare_app(wire_area)

tests/widget_set/src/main.cpp

@@ -9,6 +9,7 @@
 #include <ruis/widget/label/busy.hpp>
 #include <ruis/widget/label/text.hpp>
 #include <ruis/util/weak_widget_set.hpp>
+#include <ruis/standard_widgets.hpp>
 
 using namespace std::string_literals;