clarify "in progress" on listing page vs. on detail page

[jesteria]

In project listing page, "in progress" is a meta-status, summarizing all intermediate statuses. But in the project detail page, "in progress" is a distinct intermediate status, signifying that research/development/etc. is taking place.

Should clarify what "in progress" means on listing page vs. on detail page, via a fix to the language.

Originally posted by @jesteria in #33 (comment)