Merge pull request #555 from trezor/fix/fiat-rate-nan-l10n

Fix/message "fiat rates not available" for xrp

src/views/Wallet/views/Account/Summary/ripple/components/Balance/index.js

@@ -142,7 +142,7 @@ class AccountBalance extends PureComponent<Props, State> {
             <Tooltip
                 maxWidth={285}
                 placement="top"
-                content="Fiat rates are not currently available."
+                content={<FormattedMessage {...l10nMessages.TR_FIAT_RATES_ARE_NOT_CURRENTLY} />}
             >
                 <StyledIcon icon={ICONS.HELP} color={colors.TEXT_SECONDARY} size={12} />
             </Tooltip>