David Taylor a38830c009
DEV: Avoid site-header error when rendering fails (#22993)
When Ember rendering fails for some reason, `this.header` will be undefined. This causes site-header to raise an error, which often gets printed to the console more obviously than the actual root cause.

This commit makes site-header fail more gracefully in this situation, to avoid it being a red-herring during development/debugging.
2023-08-07 17:03:13 +01:00
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