dashboard, browser: fix missing recompute arguments

artiq/browser/experiments.py

@@ -23,7 +23,7 @@ class _ArgumentEditor(EntryTreeWidget):
         self._dock = dock
 
         if not self._dock.arguments:
-            self.addTopLevelItem(QtWidgets.QTreeWidgetItem(["No arguments"]))
+            self.insertTopLevelItem(0, QtWidgets.QTreeWidgetItem(["No arguments"]))
 
         for name, argument in self._dock.arguments.items():
             self.set_argument(name, argument)

artiq/dashboard/experiments.py

@@ -34,7 +34,7 @@ class _ArgumentEditor(EntryTreeWidget):
         arguments = self.manager.get_submission_arguments(self.expurl)
 
         if not arguments:
-            self.addTopLevelItem(QtWidgets.QTreeWidgetItem(["No arguments"]))
+            self.insertTopLevelItem(0, QtWidgets.QTreeWidgetItem(["No arguments"]))
 
         for name, argument in arguments.items():
             self.set_argument(name, argument)

artiq/gui/entries.py

@@ -45,7 +45,6 @@ class EntryTreeWidget(QtWidgets.QTreeWidget):
 
         self.bottom_item = QtWidgets.QTreeWidgetItem()
         self.addTopLevelItem(self.bottom_item)
-        self.bottom_item.setHidden(True)
 
     def set_argument(self, key, argument):
         self._arguments[key] = argument
@@ -60,9 +59,6 @@ class EntryTreeWidget(QtWidgets.QTreeWidget):
         widgets["entry"] = entry
         widgets["widget_item"] = widget_item
 
-        if len(self._arguments) > 1:
-            self.bottom_item.setHidden(False)
-
         for col in range(3):
             widget_item.setBackground(col, self.gradient)
         font = widget_item.font(0)
@@ -73,7 +69,6 @@ class EntryTreeWidget(QtWidgets.QTreeWidget):
             self.insertTopLevelItem(self.indexFromItem(self.bottom_item).row(), widget_item)
         else:
             self._get_group(argument["group"]).addChild(widget_item)
-            self.bottom_item.setHidden(False)
         fix_layout = LayoutWidget()
         widgets["fix_layout"] = fix_layout
         fix_layout.addWidget(entry)