merge changes for 3.8.3-release

.hgtags

indra/llcommon/llassettype.h

indra/llcommon/llerror.cpp

indra/llimage/llimage.cpp

indra/llinventory/llfoldertype.cpp

indra/llinventory/llfoldertype.h

indra/llmessage/llassetstorage.cpp

indra/llmessage/llhttpclient.cpp

indra/llmessage/llhttpclient.h

indra/llprimitive/llmodel.cpp

indra/llrender/llglslshader.cpp

indra/llrender/llrender.cpp

indra/llrender/llrender.h

indra/llui/llcombobox.cpp

indra/llui/llcommandmanager.cpp

indra/llui/llcommandmanager.h

indra/llui/llfolderview.cpp

indra/llui/llfolderviewitem.cpp

indra/llui/llfolderviewitem.h

indra/llui/llfolderviewmodel.h