Convert LLDictionary to string_view for lookup

indra/llcommon/llassettype.cpp

indra/llcommon/llassettype.h

indra/llcommon/lldictionary.h

indra/llinventory/llfoldertype.cpp

indra/llinventory/llfoldertype.h

indra/llinventory/llinventorytype.cpp

indra/llinventory/llinventorytype.h

indra/newview/CMakeLists.txt

indra/newview/alpanelmusicticker.cpp

indra/newview/alpanelmusicticker.h

indra/newview/llmeshrepository.cpp

indra/newview/llviewerfloaterreg.cpp

indra/newview/skins/default/textures/textures.xml

...newview/skins/default/textures/ticker_visualizer_grid.tga

indra/newview/skins/default/xui/en/floater_music_ticker.xml

indra/newview/skins/default/xui/en/panel_music_ticker.xml