Merge #1121: [GUI] Cold staking, alert user if the owner address is n…

…ot from the wallet

6daa383 [GUI] Cold staking, alert user if the owner address is not from the wallet. (furszy)

Pull request description:

  Cold staking delegation, popup alerting user if the owner address is not from the wallet.

  Preview.
  <img width="633" alt="Screen Shot 2019-11-20 at 10 59 46 AM" src="https://user-images.githubusercontent.com/5377650/69245395-80579200-0b85-11ea-9209-b981492b8f4f.png">

ACKs for top commit:
  Mrs-X:
    I'm fine with the final text, so utACK 6daa383
  random-zebra:
    utACK 6daa383

Tree-SHA512: c5095790aff0590edae9f4606263fb5be2ff886e46f0709289a0b44bb79b6b2fb218fa1b3a4ae2ebc5178dfc6e2694ccaaf615aa0bb763f5e22a7387ad054f37

src/qt/pivx/coldstakingwidget.cpp

@@ -423,6 +423,16 @@ void ColdStakingWidget::onSendClicked(){
 
     if (!isOwnerAddressFromThisWallet) {
         isOwnerAddressFromThisWallet = walletModel->isMine(inputOwner);
+
+        // Warn the user if the owner address is not from this wallet
+        if (!isOwnerAddressFromThisWallet &&
+            !ask(tr("ALERT!"),
+                    tr("Delegating to an external owner address!\n\n"
+                       "The delegated coins will NOT be spendable by this wallet.\nSpending these coins will need to be done from the wallet or\ndevice containing the owner address.\n\n"
+                       "Do you wish to proceed?"))
+            ) {
+                return;
+        }
     }
 
     // Don't try to delegate the balance if both addresses are from this wallet