fix(simple-editor): preserve scroll position across loadAll() re-renders

Regression of an earlier fix. Operators reported the editor jumping
to the top of the page on every step save / insert / remove / promote.

Root cause: .o_fp_simple_editor is the overflow:auto scroll
container. loadAll() replaces state.steps with a fresh JSONRPC
payload — OWL tears down the t-foreach and rebuilds every row, which
snaps scrollTop back to 0. Every author action (Save Step, Add
Step, Remove, Promote, Demote, Reorder, Import Template) routes
through loadAll, so the symptom hit everywhere.

Fix: capture scrollTop before the RPC, restore in a double-rAF
after the response settles. rAF (microtask runs before paint in
OWL 2; we need the rebuilt DOM to exist). One choke point fix —
every caller benefits without per-handler changes.

Cheap: a single DOM lookup + an integer save/restore. No XML or
state-shape changes.

Module: fusion_plating 19.0.20.6.0 → 19.0.20.6.1.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating/__manifest__.py

@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating',
-    'version': '19.0.20.6.0',
+    'version': '19.0.20.6.1',
     'category': 'Manufacturing/Plating',
     'summary': 'Core plating / metal finishing ERP: facilities, processes, tanks, baths, jobs, operators.',
     'description': """