v2.6.1: Fix "highest flight today" layout collision on Statistics screen

The v2.6.0 addition was drawn as a single line that could overflow
and collide with the "Reset logbook data" button. It now uses the
same two-line drawStatRow() layout (label + value) as the other
stats, with all row Y positions shifted up slightly to make room,
and the i18n strings dropped their now-redundant ": " suffix since
drawStatRow() renders label and value on separate lines.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/i18n_fr.h

@@ -117,7 +117,7 @@ static const char* const I18N_FR[] = {
     "Retouchez pour confirmer !",
     "Journal réinitialisé.",
     "Durée de fonctionnement : ",
-    "Vol le plus haut aujourd'hui : ",
+    "Vol le plus haut aujourd'hui",
     "Historique (7 derniers jours)",
     "Aucune entrée pour le moment.",
     "Comment fonctionne l'historique",