Added support for placeholder %MCU_ConsoleSessionSID% which is resolved as the current console session user SID, if there is a console session user 

If more than one uninstall instruction contains \nice.exe, HKEY_USERS\*\SOFTWARE\Lotus\Notes, HKEY_USERS\*\SOFTWARE\IBM\Notes, and HKEY_USERS\*\SOFTWARE\HCL\Notes are automatically removed.

This can be disabled by setting MCUpgrade.ini:PostUninstallRegistryCleanup=0

Things that depend on at least one uninstall instruction (e.g., shortcut removal), now specifically check for \nice.exe in at least one uninstall instruction, instead of just counting number of uninstall instructions