Fixed size of simulate windows

b_asic/GUI/simulate_sfg_window.py

@@ -16,6 +16,7 @@ from qtpy.QtWidgets import (
     QGridLayout,
     QHBoxLayout,
     QLabel,
+    QLayout,
     QLineEdit,
     QPushButton,
     QShortcut,
@@ -41,7 +42,7 @@ class SimulateSFGWindow(QDialog):
         self.setWindowTitle("Simulate SFG")
 
         self.dialog_layout = QVBoxLayout()
-
+        self.dialog_layout.setSizeConstraint(QLayout.SetFixedSize)
         self.simulate_btn = QPushButton("Simulate")
         self.simulate_btn.clicked.connect(self.save_properties)
         self.dialog_layout.addWidget(self.simulate_btn)