Manually created blocks do not appear in block listing

Here is a patch but I'm not sure if this is the optimal fix.

The problem was that the patch to add configurable block titles changed the query used to generate the list of manualy created blocks in the block_block() function so that it would load the block titles from the block table in addition to the data stored in the boxes table:

$result = db_query("SELECT bid, bl.title, info FROM {boxes} bx INNER JOIN {blocks} bl ON bx.bid = bl.delta WHERE module = 'block' ORDER BY title");

This creates a problem because the _block_rehash() function automatically creates the data in the block table from the _block() list hook.... which of course will never return the manually created blocks because they were never set. This patch simply removes the join on the blocks table.

I added back in the check_plain() for $info.

I don't think we have to fall back on the block title as it's description anymore since descriptions are now required for all blocks as of rev 1.176 :

http://tinyurl.com/s8n88