Correctly show project selector on organization pages

[mattrobenolt]

The Django-based organization settings pages weren't showing the project selector header before.

/cc @ckj

[codecov-io]

Current coverage is 82.76%

Merging #2777 into master will decrease coverage by -0.43% as of 92cf309

@@            master   #2777   diff @@
======================================
  Files          893     893       
  Stmts        34291   34291       
  Branches         0       0       
  Methods          0               
======================================
- Hit          28527   28382   -145
  Partial          0       0       
- Missed        5764    5909   +145

Review entire Coverage Diff as of 92cf309

---

Uncovered Suggestions

1. +0.07% via ...try/utils/apidocs.py#432...454
2. +0.07% via ...try/utils/apidocs.py#117...139
3. +0.06% via ...gs/sentry_helpers.py#191...211
4. See 7 more...

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[ckj]

🤘