[NFCS OPI] Fix relative path, macros issues and typos
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Fix relative path for the png files ../99-Shared to ../99-Shared/NFCS_monitoring
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Fix the MACROs SIM, DEV_FSM and DEV_IOC. They were uploaded as a simulation version by accident
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Unified English expressions to British style
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Fix typos
Edited by Jongho Choi