Preview and padlock: two leftovers after the first pass

- A node dragged taller while its preview was off keeps that height when
  the preview comes back.
- A new picture with no ratio lit starts with the padlock off, as the
  untouched picture has no shape to hold.

js/input_preview/index.js

@@ -275,7 +275,7 @@ function syncPreviewMode(state, resize) {
       // On: back to the height it had, with the last result in it.
       const before = Number(node.properties[HEIGHT_PROPERTY]);
       delete node.properties[HEIGHT_PROPERTY];
-      const height = Math.max(floor, Number.isFinite(before) ? before : 0);
+      const height = Math.max(floor, Number.isFinite(before) ? before : 0, Number(node.size?.[1]) || 0);
       node.setSize?.([node.size?.[0] ?? PANEL_MIN_WIDTH, height]);
     }
     node.setDirtyCanvas?.(true, true);

js/shared/transform_editor.mjs

@@ -1242,6 +1242,9 @@ function refitAspect(state) {
   state.refitTo = null;
   if (aspect) fitAspect(state, aspect, aspectMode(state));
   else if (state.node.properties) delete state.node.properties.ausboss_fit_aspect;
+  // A new picture with no ratio lit is back to Source: a lock left from the
+  // old one would hold nothing.
+  settleRequest(state);
 }
 
 async function loadSource(state) {