UI tweaks and fixes (#22448)

* fix double scrollbar in debug replay

* always hide ffmpeg cpu warnings for replay cameras

* add slovenian

* fix motion previews on safari and ios

match the logic used in ScrubbablePreview for manually stepping currentTime at the correct rate

* prevent motion recalibration when opening motion tuner

web/src/hooks/use-date-locale.ts

@@ -38,6 +38,7 @@ const localeMap: Record<string, () => Promise<Locale>> = {
   th: () => import("date-fns/locale/th").then((module) => module.th),
   ca: () => import("date-fns/locale/ca").then((module) => module.ca),
   hr: () => import("date-fns/locale/hr").then((module) => module.hr),
+  sl: () => import("date-fns/locale/sl").then((module) => module.sl),
 };
 
 export function useDateLocale(): Locale {