Revert "fix bug in GridView where raising filter event after rendering"

This reverts commit 21e22c0e81513a4a3cc8a58afa89b6ff85c5b039.
Revert "Update version to 6.6"

This reverts commit b6778e874a645b41722e1b1c8a0d352c099336bb.
Revert "Major revision 6.6"

This reverts commit c9d441bed0450e90dcf89e4ea4a191f44685a47c.