optimize imports and cleanup code

qutilities.py

@@ -1,44 +1,11 @@
 from PyQt5 import QtWidgets, QtGui
-from PyQt5.QtWidgets import QWidget, QSizePolicy, QVBoxLayout, QDoubleSpinBox, QMessageBox
-
-from app_config import AppCfg #option, toggle_option
-
-
-def toggle_warn(key):
-    toggle_option(key)
-    m = f"Option {key} => {option(key)}"
-    QMessageBox.warning(None, m, m)
+from PyQt5.QtWidgets import QWidget, QSizePolicy, QVBoxLayout, QMessageBox
 
 def horiz_spacer():
     spacer = QWidget()
     spacer.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
     return spacer
 
-
-def toggle_visibility(widget, state):
-    if state:
-        widget.show()
-    else:
-        widget.hide()
-
-
-def get_sep_line():
-    line = QtWidgets.QFrame()
-    line.setFixedHeight(2)
-    line.setFrameShadow(QtWidgets.QFrame.Sunken)
-    line.setFrameShape(QtWidgets.QFrame.HLine)
-    return line
-
-
-def check_font_by_id(id):
-    for family in QtGui.QFontDatabase.applicationFontFamilies(id):
-        print(family)
-
-
-def toggle_groupbox(gbox, state):
-    widget = gbox.layout().itemAt(0).widget()
-    widget.setVisible(state)
-
 def add_item_to_toolbox(toolbox, label, widget_list=[]):
     block = QWidget()
     block.setAccessibleName(label)