Put in status message while waiting for plot to be saved.  Reassures the user that the program hasn't crashed, when saving very complicated plots.
Put in status message while waiting for plot to be saved.  Reassures the
user that the program hasn't crashed, when saving very complicated plots.

svn path=/trunk/; revision=1067

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot