Students still lose projects

Students are manually deleting their code, then typing in new projects, and pressing Save, which overwrites the previous project. Ideas:
1. Add an interstitial to confirm when deleting everything.
2. "Forget" the project name when deleting everything.
3. In order to train them to think about open projects, make them click New to get a blank window the first time.
4. Do nothing, and tell them not to do that.

No files, tests, or entry points are identified in the issue. Start by locating the project deletion, blank-editor, and Save flows, then decide which proposed behavior is wanted. Done should prevent accidental overwrites through one agreed interaction and include coverage for deleting, creating, and saving projects.

Written by the indexing model from the issue text.