commit ef1829f24bf8bf2648d2ac4efa85a06e1fbc0e0b
author Russ Cox <rsc@google.com> Mon May 17 12:56:51 2021 -0400
committer Russ Cox <rsc@google.com> Mon May 24 23:12:15 2021 -0400
tree 6d405ba4c14b8073800229261e9fbaf3dc8ea49f
parent 530546278fa92c85918c027f7f3e58b4e29a7757

[x/go.dev] all: fix mobile nav "Why Go" highlights

In the mobile menu the pages in the Google section did not
highlight "Why Go" the same way as the pages in the rest of
the Solutions section. This is a bug in the current web site
which we were mimicking, but it seems worth fixing, which
will be better UX and also simplify the code.

The root cause of the problem is apparently confusion between
Hugo's Section and CurrentSection. Section returns a string, and
CurrentSection returns a Page, but that's not the only difference:
they also use subtly different meanings of the term “section”.
Specifically, Section uses the topmost section (solutions even for
solutions/google or solutions/google/chrome),
while CurrentSection uses any deeper section if present
(solutions/google for those two cases).
For the purposes of the menu, we only care about being in the
top-level "solutions" section. So use that meaning in CurrentSection,
diverging from Hugo but making the site better.

The CurrentSection name will go away entirely later.

Change-Id: I102907f347f0472527e0f48fe35280e92b9ea0d4
X-GoDev-Commit: 05f65502deea650f0d496622a9608bc212ec33b5