Add simplelayout capable behavior for sl dexterity containers.
Merge pull request #18 from 4teamwork/jone-dexterity

Dexterity Support
Do not prepend icon url with portal url in layouts to be consistent with actions.
Fix permission of simplelayout.base.actions.align
Merge pull request #19 from 4teamwork/mle-fix-align-blocks

Fix permission of simplelayout.base.actions.align
Merge branch 'master' into jin_accessibility

Conflicts:
	simplelayout/base/viewlets/controls.pt