remove 'waiting for deposit' message when deposit confirmed message i…

…s shown

fix brave#5300

Auditors: @mrose17

Test plan:
1. enable brave payments, wait up to 15 min for 'waiting for deposit' notification to appear
2. make a deposit and wait for it to be processed. the first notification should disappear when the second appears.

app/ledger.js

@@ -1530,6 +1530,8 @@ const showNotificationPaymentDone = (transactionContributionFiat) => {
   notificationPaymentDoneMessage = locale.translation('notificationPaymentDone')
     .replace(/{{\s*amount\s*}}/, transactionContributionFiat.amount)
     .replace(/{{\s*currency\s*}}/, transactionContributionFiat.currency)
+  // Hide the 'waiting for deposit' message box if it exists
+  appActions.hideMessageBox(addFundsMessage)
   appActions.showMessageBox({
     greeting: locale.translation('updateHello'),
     message: notificationPaymentDoneMessage,