Temporarily limit block minter as first stage of multipart minting fix. This will be reverted almost immediately after release.

src/main/java/org/qortal/block/Block.java

@@ -378,6 +378,10 @@ public class Block {
 				// Online account (reward-share) with current timestamp but reward-share cancelled
 				continue;
 
+			if (accountIndex >= 7850)
+				// Temporary limitation as first stage of multipart minting fix
+				continue;
+
 			indexedOnlineAccounts.put(accountIndex, onlineAccountData);
 		}
 		List<Integer> accountIndexes = new ArrayList<>(indexedOnlineAccounts.keySet());