r42Gamma4

[Chris Muller]

Thanks to everyone who reported issues with r42 gamma.  I have just
posted a yet another gamma version with additional fixes, function,
and performance.

- Fix for MaServerLocation>>#=, when comparing to unreachable hosts!

- Removed MaServerSocket>>'timeoutSeconds' since it is ambiguous with
the MaClientServerPreferences>>'timeoutSeconds'.

- Changed temporary holding area utilized by #noteOldKeysFor: to a
strong reference, avoiding any chance a GC would cause such an
operation to be lost.  A similar fix for accessing / changing objects
directly from a MagmaCollection (instead of a MagmaCollectionReader,
the normal case).

- Statistics improvement:  Real-world wants statistics for specific
Timespans.  Now the DBA can select statistics just for particular
time-periods in the past.

- Discovered that changing the Form of the mouse pointer for every
read and commit can have a significant impact on performance!  It's
now turned OFF by default.
	To get this back, set the new MagmaPreferences showStatusViaCursor:
true, otherwise, enjoy the improved performance!

 - Chris