Right package:LambdaHack
right mouse button pressed
right mouse button released
Display a, potentially, multi-screen menu and return the chosen key or
menu slot (and save the index in the whole menu so that the cursor can
again be placed at that spot next time menu is displayed).
Additionally, display something on the right half of the screen,
depending on which menu item is currently highlighted
This function is one of only two sources of menus and so, effectively,
UI modes.
A variant providing for a keypress the information about the label of
the menu slot which was selected during the keypress.
A helper for the terminal frontends that display bright via bold.