Create new "Recent folders" icon

Summary:
Needed for D7446.

BUG: 411635
FIXED-IN: 5.62

Test Plan:
{F7325143, size=full}
{F7325144, size=full}

Reviewers: #vdg, ndavis

Reviewed By: #vdg, ndavis

Subscribers: ndavis, kde-frameworks-devel, meven

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D23760