EXP-1849 FIXED Privacy settings could be set to default when modifying other preferences before login.

* Floater updates for positioning and to revert some earlier string changes.

SH-2276 Fix for failed assertions reported from debug-enabled viewers.  Also, remove "Basic Shaders" as a user settable option (shaders are always on if GL version >= 2.0, always off otherwise)

- Removed all sidetray dependencies and the sidetray itself.

- Also removed LLFloaterSidetrayTab and LLSidetrayListener as unused.

- Added a floater for People side tab.
- Replaced calls to LLSideTray with LLFloaterSidePanelContainer.

Changes:
* Click and double click in-world can now trigger click-to-walk or
  click-to-teleport actions, depending on preferences.
* Grouped keyboard- and mouse-related settings in Preferences -> Move.

LLProxy: Added another attempt to download gpu and feature tables after successfully setting up a proxy.

Other minor changes:
Clarified why we are using SOCKS5 as the "grid" argument to store proxy credentials.
Added class wide logging to the LLProxy class.

STORM-1482 The Viewer shouldn't overwrite the crash behavior settings, some cleanups to the crash reporters, and the ability to use --set GroupName.SettingName to set parameters outside of the (default) Global settings group.

Renamed llsocks5.cpp to llproxy.cpp.

STORM-1112 First pass at cleanup of SOCKS 5 proxy code based on Linden Coding Standard and comments in the code review.

Implemented improved cache control user interface, changes approved by wolf.
* Moved viewer cache controls from the setup preference panel to advanced
* Changed cache size control slider into a spinner
* Readded a clear cache button along with a cache clear confirmation dialog
* Renamed the reset button to "Default Location" to clarify its function

Related JIRAs:
ER-815
ER-816
ER-818
ER-820
ER-821
ER-831

* Modified mac feature table to bring it up to date with latest renderer features including deferred rendering
* Changed mac AGL pixel format to no longer allow it to revert to software rendering when shader compilation errors occur.
* Fixed up various GLSL shader compilation warnings and errors that came up as a result of the above changes.
* Changed initial conditions for the "hardware skinning" checkbox on the preferences floater so it can be modified before login on machines that support avatar vertex programs.
* Removed unused avatarAlphaF.glsl files

Reviewed by davep

 * Changed the hard coded cache limit in llappviewer.cpp to 10GB as well as the
   slider maximum in the preferences menu. * The VFS cache is capped at 1GB due
   to file system limitations. The former 80/20 split between texture/vfs is
   maintained up to 5GB. Above this limit the texture cache is given all
   the additional cache space up to 10GB.
 * Fixed a log message in lltexturecache.cpp that was not showing the correct
   texture size. ER-883
 * Fixed a bug in llfloaterpreference.cpp that caused new cache value to be
   written to the old cache setting. This resulted in the the cache not being
   cleared when the location was set back to the default. ER-882
 * Disabled the "The cache will be cleared on reboot" message that is triggered
   by the reset button in the cache preferences in the case where the cache
   is already located in the default location.  The cache is only cleared when
   its location is changed. This is intended to address resident confusion
   regarding the purpose of the reset button, as demonstrated in VWR-19562.

Submitting on behalf of Jonathan Yap.

STORM-1145 ADDITIONAL FIX Fixed removing the record of user favorites available at login location menu when user switches off this feature.
User favorite locations record is removed from the settings file each time when user exits the viewer with "ShowFavoritesOnLogin" setting off and his name is found on the record.

STORM-595 FIXED (The presentation of IM sessions in message well depends on method that was used for opening IM window)

- Added the callback with the timer on control name "ThrottleBandwidthKBPS" changes. Now message is sending to the simulator in 0.3 sec after LAST variable change.

SOCIAL-872 FIX -- User can toggle Show Me in Search before logging in which updates local settings file but not the actual value in the database
WEB-3750 Attempted FIX -- Gone Profile

* Check box for "show me in search" privacy setting no longer enabled until login.
* Avatar server update message only sent on status change.

Reviewed by Richard

 * Added agent validation around calls to update avatar data
 * Removed references to profile panel save options

 Reviewed by Richard

SH-956 Turning off Basic Shaders in Preferences > Graphics does not grey out expected Shadows options in Mesh Viewer
SH-957 Turning off Atmospheric Shaders greys out Lighting and Shadows options in preferences but does not turn off shadows inworld

originally done in http://bitbucket.org/leyla/leyla-mesh-development

STORM-513 FIXED "Allow media to auto - play" check-box is enable after Media check-box was unchecked

- Disabling "Allow Media to auto play" check box only when both "Streaming Music" and "Media" are unchecked

STORM-34 ADDITIONAL_FIX Made saving favorites in file per-account preference instead of per-machine.

- Made changes in code of floater preferences and panel login that were required because of turning the setting per-account.

- Added new method to LLFloaterPreference that looks for current user's record in saved favorites file and removes it.

STORM-584 ADDITIONAL FIX When the user sets the opacity for the name tag the selected opacity is shown in the color swatch to the left.
Fixed color swatch label and tooltip.
Added toolltip to opacity slider.