Capture mouse for the slider component.

CMakeLists.txt

examples/component/gallery.cpp

include/ftxui/component/captured_mouse.hpp

include/ftxui/component/component.hpp

include/ftxui/component/event.hpp

include/ftxui/component/screen_interactive.hpp

include/ftxui/component/slider.hpp

src/ftxui/component/button.cpp

src/ftxui/component/checkbox.cpp

src/ftxui/component/input.cpp

src/ftxui/component/menu.cpp

src/ftxui/component/radiobox.cpp

src/ftxui/component/screen_interactive.cpp

src/ftxui/component/slider.cpp

src/ftxui/component/toggle.cpp