Journal's project `name` should be case insensitive

[miketheman]

When a project is created/removed, journals will exist with the project's name being case-sensitive.

We can have journals for project ABC, and if it's been removed, project abc can be created, and previous journal lookups will show nothing for ABC, only abc.

It's helpful to have the context in admin interfaces for projects as they change over time - uncertain of other places.

We could:

• change journals.name to be citext instead of text
• change lower() the input and resulting value at query time

Migration to citext could have some slowdown on this table (it's got ~23 million records). We already use citext for journals.submitted_by.

Using lower() may have some query time performance issues, and we'd need to remember to use it everywhere we'd want to have those lookups be aligned.