fix(studio): the jump buttons go straight to the ends; Shift+click steps through expanded blocks

.github/workflows/studio.yml

@@ -141,6 +141,7 @@ jobs:
           node perf/stickyfold.mjs
           node perf/crumb.mjs
           node perf/hoverradius.mjs
+          node perf/jump-ends.mjs
           node perf/modelrows.mjs
           node perf/explorersize.mjs
           node perf/rowhit.mjs