Allow closing wxAuiTabCtrl pages without switching to them.

Clicking on the page "x" close button switched to the page before doing
anything else which was unusual as other tabbed controls don't behave like
this.

Handle clicks on the close button specially and avoid switching to the page
which is about to be closed anyhow.

Closes #14150.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71040 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/aui/auibook.cpp

@@ -1050,8 +1050,8 @@ void wxAuiTabCtrl::OnLeftDown(wxMouseEvent& evt)
         // wxAuiNotebooks always want to receive this event
         // even if the tab is already active, because they may
         // have multiple tab controls
-        if (new_selection != GetActivePage() ||
-            GetParent()->IsKindOf(CLASSINFO(wxAuiNotebook)))
+        if ((new_selection != GetActivePage() ||
+            GetParent()->IsKindOf(CLASSINFO(wxAuiNotebook))) && !m_hoverButton)
         {
             wxAuiNotebookEvent e(wxEVT_COMMAND_AUINOTEBOOK_PAGE_CHANGING, m_windowId);
             e.SetSelection(new_selection);