Shared code for alias dialogs

Shared code for the Alias and Query Dialogs

Functions

Function	Description	Links
alias_config_observer()	Notification that a Config Variable has changed	observer_t, observer_api
alias_recalc()	Recalculate the display of the Alias Window	MuttWindow::recalc(), window_recalc
alias_set_title()	Create a title string for the Menu