Change tooltip on container page if all modifiable ...

If all of the sections are modifiable, we don't need the second part of the tooltip that reads: "You may place them before or after the main template sections."

Only show this if some of the Sections are unmodifiable

Replace YARD documentation with Tomdoc ...

These changes use the YARD gem, but in the lighter Tomdoc format.

You can read more about Tomdoc here: https://tomdoc.org

Add tests to check that Template copying works

Merge pull request #1794 from DMPRoadmap/refactor/template-number-field ...

Remove specs referencing `sections.published`