Fix fc-solve misbehaving preset.

Summary:
See https://bugs.kde.org/show_bug.cgi?id=405187 . Apparently
incrementally increasing the iterations limit does not play nice with
the freecell-solver's "flare"s feature.

slick-rock does not use flares but may yield somewhat longer solutions
than video-editing.

Reviewers: #kde_games

Subscribers: kde-games-devel

Differential Revision: https://phabricator.kde.org/D19671