Kairong Jiang authored Mar 25, 2020 and Cory Quammen committed Mar 31, 2020

Added a new logging viewer window to ParaView. This window enables
creation of individual log viewers for ParaView processes in the
possible configurations in which ParaView can be run (client with
built-in server, client with remote server, client with remote data
server and remote render server). For configurations where server
components run as MPI jobs, a log created in this viewer is restricted
to one rank in the parallel run.

An arbitrary number of log viewers can be created and destroyed. The
logging level that controls the verbosity of the log can be changed
dynamically on each ParaView process independently.

In addition, different ParaView logging categories
(PARAVIEW_LOG_DATA_MOVEMENT_VERBOSITY,
PARAVIEW_LOG_RENDERING_VERBOSITY, PARAVIEW_LOG_APPLICATION_VERBOSITY,
PARAVIEW_LOG_PIPELINE_VERBOSITY, and PARAVIEW_LOG_PLUGIN_VERBOSITY)
can be promoted to more severe log levels to show only log messages of
interest.

Co-authored-by: Cory Quammen <cory.quammen@kitware.com>