API for shortcut blocks

[Aaron Wells]

As part of Bug #1181010 we put the "text" and "image" blocks on the top of the block picker for easy access. But, we actually just hard-coded them in there. It'd be better if we did this via an API. I propose adding a blocktype category "shortcut", for the blocks that go on the top of the block picker.

[Aaron Wells (u-aaronw)]

Patch for master: https://reviews.mahara.org/#/c/3943/

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/3943
Committed: http://gitorious.org/mahara/mahara/commit/c098b01b69286b1a9ef28f6ddb08ea308d620c4c
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit c098b01b69286b1a9ef28f6ddb08ea308d620c4c
Author: Aaron Wells <email address hidden>
Date: Fri Nov 7 19:46:09 2014 +1300

Put blocks in "shortcut" category to put them at top of the block picker

Bug 1390339: Before, we had hard-coded the "image" and "text" blocks into
the top of the block picker. With this change, a block developer can
just give their blocktype the category "shortcut" and it will show up there.

Change-Id: Ibaafc481745dd290442aa125b637394084705b00