Allow picking up of own dropped block in claim about carrycapacity

[copygirl]

Update: Considering that on death, items would be dropped for any player to pick up, I think it would be important for any player to be able to pick up the dropped block as well.

This prevents an exploit where a player could intentionally drop a block in a protected area (such as a Trader's, or a server's protected spawn) without others having the ability to clean it up, potentially blocking pathways.

Unfortunately, I can't at the moment think of a way to show to players the difference between a regular block and one that could be picked up despite of the permission restrictions. There is also an issue where dropped blocks could potentially mess with blocks that are replaceable (water, grass, certain plants), so this should be considered as well.