set the widget to be visible before adding it to the view_layout

securedrop_client/gui/widgets.py

@@ -171,10 +171,10 @@ def set_conversation(self, widget):
         old_widget = self.view_layout.takeAt(0)
 
         if old_widget:
-            old_widget.widget().setVisible(False)
+            old_widget.widget().hide()
 
         self.view_layout.addWidget(widget)
-        widget.setVisible(True)
+        widget.show()
 
 
 class SourceList(QListWidget):
@@ -694,7 +694,6 @@ def __init__(self, source_db_object: Source, sdc_home: str, controller: Client,
         main_layout = QVBoxLayout()
         main_layout.addWidget(self.scroll)
         self.setLayout(main_layout)
-
         self.update_conversation(self.source.collection)
 
     def clear_conversation(self):
@@ -770,7 +769,7 @@ def add_reply(self, message_id: str, reply: str, files=None) -> None:
 class SourceConversationWrapper(QWidget):
     """
     Wrapper for a source's conversation including the chat window, profile tab, and other
-    per-soruce resources.
+    per-source resources.
     """
 
     def __init__(self, source: Source, sdc_home: str, controller: Client, parent=None) -> None: