Restore cursor shape on exit. (#793) (#794)

CHANGELOG.md

CMakeLists.txt

examples/component/print_key_press.cpp

include/ftxui/component/mouse.hpp

include/ftxui/component/screen_interactive.hpp

src/ftxui/component/button.cpp

src/ftxui/component/checkbox.cpp

src/ftxui/component/input.cpp

src/ftxui/component/menu.cpp

src/ftxui/component/mouse.cpp

src/ftxui/component/radiobox.cpp

src/ftxui/component/resizable_split.cpp

src/ftxui/component/screen_interactive.cpp

src/ftxui/component/slider.cpp

src/ftxui/component/terminal_input_parser.cpp

src/ftxui/component/terminal_input_parser_test.cpp

src/ftxui/component/window.cpp