commit 525bf2d377c21b41971a72d694a507bf2af0ada6
Author: Dan Vrátil <dvratil@kde.org>
Date:   Tue Feb 16 17:59:32 2016 +0100

    Fix IconItem not loading non-theme icons with name
    
    Commit 5184ac introduced a small regression that caused IconItem
    to no longer load non-theme icons with name set, for instance icons
    coming from sni-qt, causing sni-qt apps to not show in systray.
    
    BUG: 359388
    FIXED-IN: 5.20
    REVIEW: 127091

diff --git a/src/declarativeimports/core/iconitem.cpp b/src/declarativeimports/core/iconitem.cpp
index 1d7921a..085f284 100644
--- a/src/declarativeimports/core/iconitem.cpp
+++ b/src/declarativeimports/core/iconitem.cpp
@@ -148,6 +148,10 @@ void IconItem::setSource(const QVariant &source)
                 //fail, use QIcon
                 } else {
                     m_icon = QIcon::fromTheme(sourceString);
+                    if (m_icon.isNull()) {
+                        // fallback for non-theme icons
+                        m_icon = source.value<QIcon>();
+                    }
                     delete m_svgIcon;
                     m_svgIcon = 0;
                     m_imageIcon = QImage();