See summary of IsValid ColumnProperty for all tables

The IsValid column in Column Properties is incredibly useful.  However, it would be nice to be able to see this for the entire DXP.  I find that I use this feature most in large (i.e. lots and lots of tables) projects, which means that I have to go through each table one at a time and sort by that column.  I would ideally like to see this for all tables in one place where I sort one time.

Additionally, I am noticing a common theme in all of the things I would like to see improved in Spotfire -- efficiency.  There are so many useful features and functions in the software that we find ourselves using them a lot, but they aren't efficient.  This is one example.