hgweb: use separate CSS class for navigation links in footer 2d93d2159e30 changed the styling of the "page_nav" CSS class to use flexbox to separate elements within the <div>. I didn't realize that this class was used outside of the links in the header. So this resulted in incorrectly formatting links in the footer of various pages. Fix that by introducing a new CSS class that preserves the old CSS behavior.

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  $ hg init

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  $ echo a > a

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  $ hg ci -Am t

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  adding a

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  $ hg mv a b

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  $ hg ci -Am t1

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  $ hg debugrename b

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  b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3

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  $ hg mv b a

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  $ hg ci -Am t2

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  $ hg debugrename a

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  a renamed from b:37d9b5d994eab34eda9c16b195ace52c7b129980

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  $ hg debugrename --rev 1 b

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  b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3

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