Call Layout() method on _set_layout

youtube_dl_gui/mainframe.py

@@ -861,6 +861,8 @@ class MainFrame(wx.Frame):
         main_sizer.Add(panel_sizer, 1, wx.ALL | wx.EXPAND, 10)
         self._panel.SetSizer(main_sizer)
 
+        self._panel.Layout()
+
     def _update_youtubedl(self):
         """Update youtube-dl binary to the latest version. """
         #self._update_btn.Disable()

youtube_dl_gui/optionsframe.py

@@ -112,6 +112,8 @@ class OptionsFrame(wx.Frame):
 
         self.panel.SetSizer(main_sizer)
 
+        self.panel.Layout()
+
     def _on_close(self, event):
         """Event handler for wx.EVT_CLOSE event."""
         self.save_all_options()