GUI: Adjust recommended # of blocks confirmed to 16

Using the Antpool conglomerate's 48% would make this absurd (800+ blocks), so instead base it on Foundry at 31%

Author: luke-jr

src/qt/transactionrecord.h

@@ -79,7 +79,7 @@ class TransactionRecord
     };
 
     /** Number of confirmation recommended for accepting a transaction */
-    static const int RecommendedNumConfirmations = 6;
+    static const int RecommendedNumConfirmations = 16;
 
     TransactionRecord():
             hash(), time(0), type(Other), address(""), debit(0), credit(0), idx(0)

src/qt/transactiontablemodel.cpp

@@ -454,7 +454,7 @@ QVariant TransactionTableModel::txStatusDecoration(const TransactionRecord *wtx)
     case TransactionStatus::Unconfirmed:
         return QIcon(":/icons/transaction_0");
     case TransactionStatus::Confirming:
-        switch(wtx->status.depth)
+        switch (wtx->status.depth * 6 / TransactionRecord::RecommendedNumConfirmations)
         {
         case 1: return QIcon(":/icons/transaction_1");
         case 2: return QIcon(":/icons/transaction_2");