Schedule conditional formating repaint after filtering is completed

Schedule conditional formating repaint after filtering is completed

When we have sheet with lots of data with applied conditional formatting
and that data is used with autofilter feature - filtering is very slow.
That was caused by repaints synchronously called on every row show/hide.

ScConditionalFormat::DoRepaint()   called by ScFormulaListener callback
...
ScDocument::Broadcast
ScColumn::BroadcastRows
ScTable::SetRowHidden
ScTable::DBShowRows

This patch schedules repaint in the Idle so we do that after all changes
are already applied.

Change-Id: If0876ada0f336a41b69560db6a581d6e24d7ac16
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/156897
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
(cherry picked from commit c838c24a7e1eee9709789aab99b242f0a0c8c419)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/156969