global SetWMCaption

function SetWMCaption(
  title: string,
  titleShort: string?
) ->  nil

@param titleShort - (Default: title)

Sets the window title for the process (default: “Spring ").

The shortTitle is displayed in the OS task-bar (default: “Spring ").

NOTE: shortTitle is only ever possibly used under X11 (Linux & OS X), but not with QT (KDE) and never under Windows.