fix(snapping): add participant specific min resize bounds

closes #290

lib/features/snapping/BpmnSnapping.js

@@ -131,6 +131,10 @@ function BpmnSnapping(eventBus, canvas) {
 
     if (is(shape, 'bpmn:Participant')) {
         context.minDimensions = { width: 400, height: 200 };
+        context.childrenBoxPadding = {
+            left: 50,
+            right: 35
+        };
     }
 
     if (is(shape, 'bpmn:TextAnnotation')) {
@@ -261,4 +265,4 @@ BpmnSnapping.prototype.addTargetSnaps = function(snapPoints, shape, target) {
     }
   });
 
-};
+};

test/spec/features/snapping/BpmnSnappingSpec.js

@@ -220,4 +220,4 @@ describe('features/snapping - BpmnSnapping', function() {
 
   });
 
-});
+});