"Disable Developer Modules" needs a confirmation

With custom features modules it's easily possible to end up with a dependency between a non-developer module and a developer module. It's also feasible to assume that some contrib modules incorrectly place a dependency on dev modules. With this in mind, and on the basis that some site builders may click the menu entry without first checking or configuring the list of dev modules, I think we need to introduce a confirmation screen, something like this:

The following modules will be disabled:

• Devel
• Views UI
• etc

Additionally, the following dependent modules will also be disabled:

• Random contrib module
• Random features module
• etc

Would you like to continue?
[Yes] [No]