fix wxConfig::DeleteGroup() for arguments with trailing slash (replaces patch 1624589)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44126 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fileconf.cpp

@@ -1172,7 +1172,7 @@ bool wxFileConfig::DeleteEntry(const wxString& key, bool bGroupIfEmptyAlso)
 
 bool wxFileConfig::DeleteGroup(const wxString& key)
 {
-  wxConfigPathChanger path(this, key);
+  wxConfigPathChanger path(this, RemoveTrailingSeparator(key));
 
   if ( !m_pCurrentGroup->DeleteSubgroupByName(path.Name()) )
       return false;