Make buttons same size as window

main.py

@@ -127,11 +127,11 @@ class Cast(wx.Frame):
 
         for cast in self.m_chromecasts:
             friendly_name = cast.cast_info.friendly_name
-            btn = wx.Button(self.m_panel, id=-1, label=friendly_name)
+            btn = wx.Button(self.m_panel, id=-1, label=friendly_name, size=(480,40))
             btn.Bind(wx.EVT_BUTTON,
                      lambda event, chromecast=cast, muri=uri: self.
                      set_chromecast(event, chromecast, muri))
-            self.m_sizer.Add(btn)
+            self.m_sizer.Add(btn, wx.ALIGN_CENTER_VERTICAL)
         self.m_panel.SetSizer(self.m_sizer)
         self.m_sizer.Fit(self)
         self.m_panel.Layout()