added stop_updating and restore_updating functions to Projection and ProjectionSheet to allow freezing of their state during e.g. pattern_present
added stop_updating and restore_updating functions to Projection and ProjectionSheet to allow freezing of their state during e.g. pattern_present


ioam/svn-history,ioam/svn-history,ioam/svn-history,ioam/svn-history,ioam/svn-history