When you create an autofilter on a column which contains many different
values, you will have problems.

First of all, if you exceed 65535 values, you will enter in an infinite
loop because a uint16 is incremented for each value, and after 65535,
you restart to 0.

Secondly, the algorithm executes a double loop in O(n2) to determine
checked values, it's too long. Instead of that, all checked values can be
determined before.

This patch is graciously offered by Linagora.

Change-Id: Idc4500f6a496ae789aae11eb0e183aee157daa20
Reviewed-on: https://gerrit.libreoffice.org/38269Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>