Terminal App:  Replaced the use of self.get_current_user() with self.current_user to reflect the recent changes to how that particular attribute of a GOApplication is set.
terminal.py:  Removed the __del__() method as it was causing a minor memory leak.
terminal.py:  Fixed a bug that was causing captured file FDs from being closed properly (un-commented something I had commented out while testing a few commits ago and subsequently forgotten about).
logviewer.py:  Changed how the terminal emulator is cleared in order to fix a problem where viewing flat logs would create image files in /tmp that would never get cleaned up.
Logging Plugin:  Changed how the terminal emulator is cleared in order to fix the same problem as above.
termio.py:  Fixed a transient exception that could occur when the user closed a terminal in the middle of a resize event.