Debugger[cdb/gdb]: Fix formatting of integers/messages.

- Do not reformat boolean values (true,false) as hex/oct.
- char/unsigned char types (cdb/gdb): Chop off the quoted
  printable character output by the debugger, pass around integer
  only and append the character ourselves in the watchhandler,
  making reformatting as hex/octal work.
- cdb: Check format correctly (fix values output as plain integer).
- cdb: Kill needless warning produced by reformatting output of out-of-scope
  variables.
- cdb: Display exceptions in the status bar as non-intrusive crash notification.

Reviewed-by: hjk