R5.5: ElyTable right-click menus, Excel-style; three rounds used, last fixes tested

Grid and header menus share ely_office::menu with ElyDoc. Each item's
availability is the kernel's state for the exact command it runs
(patch 0045). Patch 0046 lets a header select its row or column while
a shape is selected or its text is edited: the view shell ends the
drawing edit, keeps the typed text, leaves drawing mode, then marks.
Ely no longer sends Esc first.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/ely-doc/src/tests/find.rs

@@ -126,7 +126,7 @@ fn a_misspelled_word_offers_suggestions() {
     settle(&cx, |app| docs.read(app).offer.is_some());
     let rule = cx.update(|app| {
         let offer = docs.read(app).offer.as_ref().expect("an offer");
-        let spelling = offer.offered.spelling.as_ref().expect("a spelling menu");
+        let spelling = offer.what.spelling.as_ref().expect("a spelling menu");
         let (_, rule) = spelling
             .suggestions
             .iter()