Emit a new line when a component is interrupted.

While running a component, make sure to reset the cursor at the end of
the component and insert a new line.

This fixes:
https://github.com/ArthurSonzogni/FTXUI/issues/6

src/ftxui/component/screen_interactive.cpp

@@ -111,7 +111,7 @@ void ScreenInteractive::Loop(Component* component) {
     std::cout << reset_cursor_position;
     std::cout << SHOW_CURSOR;
     std::cout << ENABLE_LINE_WRAP;
-    std::cout << std::flush;
+    std::cout << std::endl;
   });
 
   // Handle resize.