Set up default currency accounts automatically (#72)

frontend/app/lib/l10n/en.arb

@@ -160,7 +160,10 @@
   "wRecent": "Recent activity",
   "wSeeAll": "See all",
   "wEmptyActivity": "Your next move starts here. Your transactions will appear below.",
-  "wEmptyAccounts": "No currency accounts have been set up for you yet. Contact support to request account setup.",
+  "wEmptyAccounts": "We couldn’t finish setting up your currency accounts. Try again to continue.",
+  "wAccountsLoading": "Getting your RUB, USDT and USDC accounts ready…",
+  "wAccountsFailed": "We couldn’t load your currency accounts. Try again to continue.",
+  "wAccountsRetry": "Try again",
   "wRefresh": "Refresh",
   "wSource": "From account",
   "wDestination": "To account",