All block reporters to be clickable in dev mode

In dev mode you can now right click a speech bubble as a block is
reporting to inspect it using the developer menu.
I wasn't able to "easily" find an image of a scratch block reporting in the wiki. Scratch is using images + 'drawn' blocks by converting text to some native HTML.  (Scratch has a whole bunch of advantages in terms of documentation that we don't have.) I'm not sure if it is possible to export an image of scratch blocks from the main UI? (Which is why this is dev-mode only.)

As  far as not having the background --  yes, it's a big deal for presentation. (It also has a negative effect on file size and for readability.)

Removing the grey background is hard, doesn't lead to the same quality, and takes time...time that many people don't have. 
I do agree a full solution would be better, however, this has been effective for me while minimizing changes to Snap<i>!</i> that would affect others.