add initial support for viewing variants in the sdk config tree. refactor some code which initializes sbsv2 contexts.
some hacks added for re-loading configurations when the default config is a variant.
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<h1>Build Log</h1>
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--------------------Configuration: GetTRKVersion - Win32 Release--------------------
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<h3>Command Lines</h3>
<h3>Results</h3>
GetTRKVersion.dll - 0 error(s), 0 warning(s)
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