Put toolBar top by default

labelme/app.py

@@ -742,7 +742,6 @@ class MainWindow(QtWidgets.QMainWindow):
         )
 
         self.tools = self.toolbar("Tools")
-        # Menu buttons on Left
         self.actions.tool = (
             open_,
             opendir,
@@ -842,7 +841,7 @@ class MainWindow(QtWidgets.QMainWindow):
         toolbar.setToolButtonStyle(Qt.ToolButtonTextUnderIcon)
         if actions:
             utils.addActions(toolbar, actions)
-        self.addToolBar(Qt.LeftToolBarArea, toolbar)
+        self.addToolBar(Qt.TopToolBarArea, toolbar)
         return toolbar
 
     # Support Functions