Change sview to use GMutex instead of GStaticMutex

NEWS

src/sview/block_info.c

src/sview/common.c

src/sview/front_end_info.c

src/sview/job_info.c

src/sview/node_info.c

src/sview/part_info.c

src/sview/resv_info.c

src/sview/sview.c

src/sview/sview.h