When resuming a lesson - the table of contents markers (little owls) are not preserved.

[emasters]

Opened by @johnmayer https://github.com/CCALI/CALI-Author/issues/195
When a student runs a lessons, then exits, then comes back and clicks to resume a lesson, the score is preserved, and the student is taken to the last completed page, but the table of contents doesn't show any progress - the little owls are missing from the completed TOC entries.

[emasters]

Related to #146

The progress icons do not appear because we are not reloading the entirety of the Lesson back into the viewer on resume. Only total score info is reloaded.
To solve this the entirety of the run XML needs to be loaded back into the viewer and the complete state of the Lesson run needs to restored in the viewer when a student selects resume.
Students have been asking about having this added and it would improve usability a great deal. Many students are reworking the entire Lesson or starting a new run because it isn't obvious that all of their work has been saved.