Create source of document with sections should show sections side to side with created document

[koeltv]

When creating a source on the left (see #2), when opening the original document as a glose on the right, if it contains more than 1 block, it shows as empty.

When creating from a document with only one block: Result:

When creating from a document with more than one block: Result:

Phase 1

• [x] Scenarios (Gherkin)
• [x] Implementation strategy
• [x] Mockup

  Phase 2

• [x] Acceptance tests (Capybara)
• [x] Implementation

  Phase 3

• [ ] Screencast