Feature wishlist for dev_toolbar resurrection

[raghubetina]

We used to have a gem called dev_toolbar which stickied a list of handy links to the right side of the screen when Rails was running in dev mode. We ended up retiring it but is it time to bring it back?

• By default it can display links like/rails/info/routes.
• It can be configurable by the user to display any links they want, e.g. /rails/db, /git.
• It could have a button to open web-console (but need to test whether this old issue is still happening).
• We can check out how rack-mini-profiler works to insert its markup. Middleware?

[raghubetina]

Other ideas:

• A page that shows an ERD of the current data model.
• A "migration builder".
• A link to your latest build in Grades (or the Resource show page).
  • Could be a system call to rake grade, too.

[bpurinton]

Could be a system call to rake grade, too.

That might eliminate the need for this other idea as well: https://github.com/firstdraft/grade_runner/issues/77