Rename IsConfirmed to IsTrusted to better match the intended behavior.

This doesn't change the functionality at all.

src/qt/transactionrecord.cpp

@@ -164,7 +164,7 @@ void TransactionRecord::updateStatus(const CWalletTx &wtx)
         (wtx.IsCoinBase() ? 1 : 0),
         wtx.nTimeReceived,
         idx);
-    status.confirmed = wtx.IsConfirmed();
+    status.confirmed = wtx.IsTrusted();
     status.depth = wtx.GetDepthInMainChain();
     status.cur_num_blocks = chainActive.Height();