diff --git a/main.py b/main.py
index d5360fc..36539f3 100755
--- a/main.py
+++ b/main.py
@@ -7,9 +7,6 @@ import time
 import webbrowser
 
 from PySide2.QtCore import QObject, QThread, Signal, Slot
-
-from PySide2.QtGui import QPalette, QColor
-
 from PySide2.QtWidgets import (
     QApplication,
     QDialog,
@@ -51,11 +48,6 @@ class Dialog(QDialog):
     def __init__(self):
         super(Dialog, self).__init__()
 
-        palette = self.palette()
-        palette.setColor(QPalette.Window, QColor(255, 255, 255))
-        self.setPalette(palette)
-        self.setAutoFillBackground(True)
-
         self.setWindowTitle("OrgEditor")
         scrSize = self.screen().size()
         self.resize(scrSize.width() / 1.5, scrSize.height() / 1.5)
@@ -88,8 +80,6 @@ class Dialog(QDialog):
         self.tabBar.addTab("Agenda")
         self.tabBar.addTab("Notes")
         self.tabBar.addTab("Tasks")
-        self.tabBar.addTab("History")
-
         self.tabBar.currentChanged.connect(self.update_tab)
 
         layout.addWidget(self.tabBar)
@@ -113,8 +103,6 @@ class Dialog(QDialog):
             self.loadNotes()
         elif tabIndex == 2:
             self.loadTasks()
-        elif tabIndex == 3:
-            self.loadHistory()
 
     def startLoad(self):
         self.edit.setDisabled(True)
@@ -168,7 +156,7 @@ class Dialog(QDialog):
 
     def build_agenda_task_widget(self, item):
         box = QHBoxLayout()
-        frame = QFrame()
+        frame = QGroupBox()
         frame.setLayout(box)
 
         state_button = QPushButton(text=f"{item.state or '-'}", maximumWidth=60)
@@ -227,9 +215,6 @@ class Dialog(QDialog):
     def loadTasks(self):
         logging.warning("loadTasks not yet implemented")
 
-    def loadHistory(self):
-        logging.warning("loadHistory not yet implemented")
-
 
 # Create the Qt Application
 if __name__ == "__main__":