Fix #120: Centre the add block page
remove comments
More scroll issues
Merge pull request #134 from k88hudson/120

Fix #120: Centre the add block page
#104 - Abstracted editor for blocks into typed editor components
#104 - Added color picker view, some styles, some click functionality
#104 - working colour picker
Fix #104 - Style, small fixes
#104 - revert dev comments
#104 - generate color groups
#104 - utils tests
fixes for style