qtvcp -dialog_widget: remove filename auto completer from save dialog

if anyone complains, I'll make it configurable.

Author: c-morley

lib/python/qtvcp/widgets/dialog_widget.py

@@ -716,8 +716,10 @@ def save_dialog(self, extensions = None, preselect = None, directory = None):
             self.setDirectory(os.path.expanduser(directory))
         if preselect:
             self.selectFile(os.path.basename(preselect))
-        else:
-            self.selectFile(' ')
+
+        # disable filename auto completer
+        for le in self.findChildren(QLineEdit):
+            le.setCompleter(None)
 
         self.setWindowTitle('Save')
         STATUS.emit('focus-overlay-changed', True, 'Save Gcode', self._color)