Uncommon problem - I have mined quite a lot of blocks and want to move to another address/exchange.
Now when  I try to send about 900 (quantity?! I am not sure how these are called - in this particular case they are the blocks) there is a fee and the transaction goes through:



The problem is when I try to send more (quantity) I hit the maximum for a transaction and wallet would not process the transaction.
The following appears after I enter my wallet encryption key and hit enter:



And then:



What is the limit of a transaction (max quantity or bytes or something)?
I could go ahead and select them (quantity/blocks) manually but that would be a physical and mental challenge:
ARROWDOWN, SPACE, ARROWDOWN, SPACE, ARROWDOWN, SPACE, ARROWDOWN, SPACE, ARROWDOWN, SPACE,  and so on... thousands of times!
That "problem" is very peculiar and I wouldn't think it would a be a very common one.
Still - does anybody have any ideas how to proceed, so I make my life easier?