don't make pixmaps bigger than needed

create the pixmap texture of icons just as big as icon's actualsize
for that given size, not having unneeded padding around.
It also makes plaintedWidth/paintedHeight return actually sensible
values

src/declarativeimports/core/iconitem.cpp

@@ -85,7 +85,7 @@ public:
     QPixmap pixmap(const QSize &size) override
     {
         KIconLoader::global()->setCustomPalette(Plasma::Theme().palette());
-        QPixmap result = m_icon.pixmap(window(), size);
+        QPixmap result = m_icon.pixmap(window(), m_icon.actualSize(size));
         KIconLoader::global()->resetPalette();
         return result;
     }