Use consistent quickindex wrapper around hand-written list-of-links t…

[adamdruppe]

…ables

About half the files did it one way and half did it another way. See:

https://dlang.org/phobos/std_algorithm.html
vs
https://dlang.org/phobos/std_encoding.html

for example. Whereas the handwritten list of links is semantically a quickindex the same as the auto-generated version, I decided to consistently apply that quickindex class throughout, so going with what std.algorithm (and std.math, std.ascii, and std.net.curl, among other random modules) has now extended consistently to all of them.

Note that I did NOT apply this to all the std.algorithm submodule "cheat sheets" because those tables are not just a list of links, those are more prose-y than list-y.

Then we can also change style on them consistently, if desired in the future, with one css rule without affecting other tables.

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