Refactor / Code-Tidy: Naming of DSL items in pages/section sample files

[luke-hill]

The final of a few small issues I'm tagging as "Good for newcomers"

Issue: In general the names of things in the cucumber suite isn't good. We have things that are called removing_links e.t.c. and on the whole they should have more semantic names

Pitfalls to watch out for

• Once renaming these, you'll need to check you've hit every occurrence. So long as you have a good IDE you'll cover all of these
• For bonus points see if you can also fix up the file-names for Classes, a filename for a single class should be identical (in snakecase), to the class name.

Feel free to ask if there are any issues.