rectpacking: Do node micro layout before and after layout.

Previously it was only done after because whitespace elimination might
change node sizes. However, if the node size cannot fit the label, we
need to do this before the layout too.

plugins/org.eclipse.elk.alg.rectpacking/src/org/eclipse/elk/alg/rectpacking/RectPackingLayoutProvider.java

@@ -58,6 +58,11 @@ public void layout(final ElkNode layoutGraph, final IElkProgressMonitor progress
         boolean tryBox = layoutGraph.getProperty(RectPackingOptions.TRYBOX);
         List<ElkNode> rectangles = layoutGraph.getChildren();
 
+        // if requested, compute nodes's dimensions, place node labels, ports, port labels, etc.
+        if (!layoutGraph.getProperty(RectPackingOptions.OMIT_NODE_MICRO_LAYOUT)) {
+            NodeMicroLayout.forGraph(layoutGraph).execute();
+        }
+
         // Check whether regions are stackable and do box layout instead.
         boolean stackable = false;
         if (tryBox && rectangles.size() >= 3) {
@@ -129,7 +134,7 @@ public void layout(final ElkNode layoutGraph, final IElkProgressMonitor progress
                     layoutGraph.getProperty(InternalProperties.DRAWING_HEIGHT) + padding.getVertical(), false, true);
         }
 
-        // if requested, compute nodes's dimensions, place node labels, ports, port labels, etc.
+        // Do micro layout again since the whitspace elimination and other things might have changed node sizes.
         if (!layoutGraph.getProperty(RectPackingOptions.OMIT_NODE_MICRO_LAYOUT)) {
             NodeMicroLayout.forGraph(layoutGraph).execute();
         }