Log Message:
Changes 4.6.3:
* NEW space raises console for console mode gnuplot on Windows
* CHANGE -persist mode does not open text window of wgnuplot
* FIX -persist mode broken on Windows
* FIX -persist mode results in zombie process if using wxt terminal on Windows
* FIX suppression of color in linetypes after "set term ... mono"
* FIX synchronization of graphics and text color in latex terminals