replace Courier font with Courier New to to speed up application start

Author: redvox

app/gui/config_dialog.py

@@ -26,7 +26,7 @@ def __init__(self, parent=None):
         self.resize(self.initial_width, self.initial_height)
 
         self.text_box = QPlainTextEdit(self)
-        font = QtGui.QFont("Courier")
+        font = QtGui.QFont("Courier New")
         font.setPointSize(14)
         self.text_box.setFont(font)
         self.text_box.setStyleSheet("color: black; background-color: white;")