Hide page removed from wxAuiNotebook

It doesn't make sense to leave the page shown, and overlapping the
remaining pages, after removing it.

see acff8466a7

CHANGES.rst

@@ -40,7 +40,8 @@ New and improved in this release:
 
 * Added orientation parameter to UltimateListControl.GetScrollPos. (PR#1632)
 
-
+* wx.AuiNotebook RemovePage() now hides the removed page, so it needs to be
+  shown again if it is reused in another place. (PR#1668)
 
 
 4.1.0 "Escaping the Quarantine"

wx/lib/agw/aui/auibook.py

@@ -3714,6 +3714,8 @@ class AuiNotebook(wx.Panel):
         if not wnd:
             return False
 
+        wnd.Show(show=False)
+
         # find out which onscreen tab ctrl owns this tab
         ctrl, ctrl_idx = self.FindTab(wnd)
         if not ctrl: