MX_SHELLEX enhancement for server side of ATE: New waitflag bit +4 disables the normal 10 second time out waiting for the ShellExecute operation to complete. Normally 10 seconds is more than enough time to determine whether the launch was successful or not, but there are some cases, most notably under Vista when the launch requires the user to confirm "elevation", that the server was otherwise timing out while ATE was still waiting for the ShellExecute to return. In such as case, an unreliable error status was often being returned, and then when the command finally did return, the normal response code was ending up in the keyboard buffer, possibly confusing the application. Specifying the +4 flag should not have any effect on older versions of A-Shell or under non-ATE situations.
Note that wait is independent of the existing waitflag option +1, which suspends ATE until the launched application completes. +4 only waits until the program is launched, not until it is closed.
