Log viewer improvements
Many improvements to the initial Log Viewer, including:
- Much simpler controls for elevating severity of ParaView category log messages
- Preventing duplicate log creation (same process/same rank)
- Hiding unused rank control when a process has only 1 rank
- Support for multirow selection in the log viewer widget and proper display of multiple selections in the details view
- Ability to export text in the details view to a text file
- Hides not as useful columns (Process, File:line)
- Advanced icon that shows all columns in the log tree view
- Coloring of log messages above INFO level (warnings are yellow, errors are red)
- Prevention of opening more than one Log Viewer window
- Raising the Log Viewer window if the menu item is selected a second time