Fix hidden panes: remove duplicate se-pane wrapper from PaneCP and PaneSubObjects

AppShell already wraps each component in div.se-pane; the inner se-pane
had display:none without .active, hiding all content.
Also drop stale movement/part/line/measure bar fields (bar IDs are opaque).

static/components/PaneFO.js

@@ -112,10 +112,7 @@ export const PaneFO = {
                 children.push(
                     h('h4', { style: 'margin:0 0 0.5rem' }, `Bar: ${node.id}`),
                     h(ObjectExtended, { fields: [
-                        { key: 'movement', value: node.movement },
-                        { key: 'part',     value: node.part },
-                        { key: 'line',     value: node.line },
-                        { key: 'measure',  value: node.measure },
+                        { key: 'id', value: node.id, editable: false },
                     ], onChange: null }),
                 );
             } else {