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_it.h

@@ -117,7 +117,7 @@ static const char* const I18N_IT[] = {
     "Tocca di nuovo per confermare!",
     "Registro reimpostato.",
     "Tempo di attività: ",
-    "Volo più alto oggi: ",
+    "Volo più alto oggi",
     "Cronologia (ultimi 7 giorni)",
     "Ancora nessun dato.",
     "Come funziona la cronologia",