fix typo for LeftEdge

--this was breaking the AlwaysVisible experience
for Left docks

app/xwindowinterface.cpp

@@ -105,7 +105,7 @@ void XWindowInterface::setDockStruts(WId dockId, const QRect &dockRect, Plasma::
             strut.bottom_end = dockRect.x() + dockRect.width() - 1;
             break;
 
-        case Plasma::Types::Left:
+        case Plasma::Types::LeftEdge:
             strut.left_width = dockRect.width();
             strut.left_start = dockRect.y();
             strut.left_end = dockRect.y() + dockRect.height() - 1;