1. If user passes a non-existant filename on the commandline, just open

a new file, don't raise a dialog.  IDLEfork 954928.
2. Refactor EditorWindow.wakeup() to WindowList.ListedToplevel.wakeup() and
   clarify that the Toplevel of an EditorWindow is a WindowList.ListedToplevel.
3. Make a number of improvements to keyboard focus binding.  Improve window
   raising, especially in the debugger.  IDLEfork Bug 763524 (GvR list).
4. Bump idlever to 1.1a3

M Debugger.py
M EditorWindow.py
M FileList.py
M NEWS.txt
M PyShell.py
M WindowList.py
M idlever.py