SWF-21 Initial setup for “loading” during account tap

- we may need to refine this a bit, but for now we display an alert that we are loading once the user taps their account
- it will auto-dismiss and push to account details when the web service returns

SynchronyFinancial/SynchronyFinancial WatchKit Extension/AccountTableInterfaceController.swift

@@ -47,10 +47,14 @@ class AccountTableInterfaceController: WKInterfaceController {
     }
 
     override func table(_ table: WKInterfaceTable, didSelectRowAt rowIndex: Int) {
+        presentAlert(withTitle: "Loading...", message: "Loading Account Details and Recent Transactions", preferredStyle: .alert, actions: [WKAlertAction(title: "cancel", style: .cancel, handler: {
+            self.dismiss()
+        })])
         acctDict.updateValue(accounts[rowIndex], forKey: "acct")
         FetchData.fetchTransactionsFor(accountAlias: accounts[rowIndex].accountAlias) { transactions, error in
             guard error == nil else { return }
             self.transactionDict.updateValue(transactions, forKey: "transactions")
+            self.dismiss()
             self.presentController(withNames: ["AccountDetails", "Transactions"], contexts: [self.acctDict, self.transactionDict])
         }
     }