Add ~/.local/share/icons to icons search paths
Summary: We need to add ~/.local/share/icons to icons search paths in plasma-integration.
Reviewers: jriddell, broulik, davidedmundson
Reviewed By: davidedmundson
Subscribers: rkflx, davidedmundson, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D5093