qtvcp -allow keyboard entry with the caculator widget

Some people like to use a keyboard too.

Author: c-morley

lib/python/qtvcp/widgets/calculator.py

@@ -30,7 +30,7 @@ def __init__(self, parent=None):
 
         self.display = QLineEdit('0')
         self.display.setMinimumHeight(30)
-        self.display.setReadOnly(True)
+        self.display.setReadOnly(False)
         self.display.setAlignment(Qt.AlignRight)
         self.display.setMaxLength(15)