Table: Simplify reflow instantiation
Table: "create" parameter for _refresh() is only used in columntoggle

Thus, replace it with an instance variable turned on at the beginning of
_create() and turned off at the end of _create(). This removes the need for
_refresh(). refresh() can now handle the actual refresh, and rebuild() becomes
and alias for refresh(). We should deprecate rebuild() in favour of refresh().
Table: Replace references to "rebuild" with "refresh" in the tests