EXP-760 Selecting No Device for output and input in Sound Devices in Basic mode still results in voice having input and output - also 2 default options

Automated merge with bundle:F:\code\viewer-experience+c:\users\richard\appdata\local\temp\thg.4vsiw5\ssh__richard@hg.lindenlab.com_richard_viewer-experience-merge_qwnptv.hg

flys avatar to end point but avatar spins and shakes when arriving at click point.

fixing merge error

EXP-789 Reducing size of sound device panel in Basic Mode does not resize elements in the panel and allows panel to be smaller than elements it contains

ignore button reordering in basic mode
use preferred button collapse order

This library was only needed on the Mac, and only with the OS X 10.4 SDK. As
of October 2010, we no longer build the viewer with that SDK. The 10.5 SDK
we're currently using directly supports the functionality for which we
originally brought in Pth.

Reviewed by Richard.

EXP-664 : Make encoding parameters more resilient to bad entries, add levels as encoding parameters, update test applet to support this

EXP-584 FIXED View button on bottom bar is hidden when launching Basic Viewer with Voice options added back in
corrected order in which buttons are collapsed so that they collapse right to left

No real progress on this Jira yet but Mac build was not properly reporting the CURL error string.
This check-in fixes that.

So far, I have backed out URL related changes between 2.6.2 and 2.6.3 without any change in behavior.
Unsure how to proceed next although comparing libcares and libcurl builds between 2.6.2 and 2.6.3 seems
like it could be the next logical step.

Users experiencing the problem can go back to vewere 2.6.2 or adjust DNS settings to use the google free
DNS servers 8.8.8.8 and 8.8.4.4 which should allow them to work around the problem.

Reviewed by Richard.

Modified Mac OS_VERSION string to include OS X version number in addition to Kernel version info.
DARWIN llcommon build now depends on Carbon in order to provide this functionality.

Reviewed by Richard.