goblin: polish FR stale label + fix raw-key leaks on this branch

FR wallets.tx_stale was 'En attente trop longtemps' (noun + adverb, not
grammatical); now 'En attente trop longue', adjective agreeing with attente.
Other five locales for tx_stale / receipt.stale_note read natural, left as-is.

Also carries the two raw-key leak fixes (goblin.receipt.copied ->
goblin.receive.copied, wallets.canceled -> wallets.tx_canceled) and the
every_t_call_site_key_exists_in_en guard so this branch is clean standalone.

src/gui/views/goblin/mod.rs

@@ -3503,7 +3503,7 @@ impl GoblinWalletView {
 								RichText::new(format!(
 									"{} {}",
 									crate::gui::icons::CHECK,
-									t!("goblin.receipt.copied")
+									t!("goblin.receive.copied")
 								))
 								.font(FontId::new(13.0, fonts::medium()))
 								.color(t.pos),

src/gui/views/wallets/wallet/txs/content.rs

@@ -572,7 +572,7 @@ impl WalletTransactionsContent {
 											)
 										}
 									}
-									_ => format!("{} {}", X_CIRCLE, t!("wallets.canceled")),
+									_ => format!("{} {}", X_CIRCLE, t!("wallets.tx_canceled")),
 								}
 							};