Merge pull request #5564 from Ronid1/bug/5525_sequence_diagram_fix_note_z_position

Bug/5525 sequence diagram fix note z position

cypress/integration/rendering/sequencediagram.spec.js

@@ -464,6 +464,18 @@ context('Sequence diagram', () => {
         {}
       );
     });
+    it('should render notes over actors and participant', () => {
+      imgSnapshotTest(
+        `
+        sequenceDiagram
+        actor Alice
+        participant Charlie
+        note over Alice: some note
+        note over Charlie: other note
+      `,
+        {}
+      );
+    });
     it('should render long messages from an actor to the left to one to the right', () => {
       imgSnapshotTest(
         `

packages/mermaid/src/diagrams/sequence/svgDraw.js

@@ -415,11 +415,11 @@ const drawActorTypeActor = async function (elem, actor, conf, isFooter) {
   const center = actor.x + actor.width / 2;
   const centerY = actorY + 80;
 
-  elem.lower();
+  const line = elem.append('g').lower();
 
   if (!isFooter) {
     actorCnt++;
-    elem
+    line
       .append('line')
       .attr('id', 'actor' + actorCnt)
       .attr('x1', center)