remove all metacat terminology
Morpho still has portions of the UI that refer to Metacat -- need to change this
to "Network" terminology instead.
Updated by Dan Higgins over 20 years ago
Carried out a global search for 'metacat' across all Morpho source files and
replaced all instances of 'metacat' that appear in GUI components (i.e. labels
and buttons) with 'network'.
Note that instances of 'metacat' within error messages (and comments) were not