Random build tool improvements from oldchemy and firestorm, subject to cleanup still

indra/newview/app_settings/settings_alchemy.xml

indra/newview/llfloaterpreference.cpp

indra/newview/llfloatertools.cpp

indra/newview/llmanip.cpp

indra/newview/llmanipscale.cpp

indra/newview/llmanipscale.h

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

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