Bug 551066 - [Reveal Service] Revealing a control does not work within a category Defer finding the renderer of the control because in the case of a control within a category view it will not be rendered until the category itself is first revealed by a prior reveal step. Change-Id: Id0a7c876a08d7dbc706f2ee41fecc039897d7561 Signed-off-by: Christian W. Damus <give.a.damus@gmail.com>