Hide "All" button if JSON flag is set

[tommcc]

This adds a conditional in the nav template that will hide the "All" button if the ishControlsHide.views-all flag is set. Previously, this option existed, but was not used anywhere.

Relies on a pattern-lab/patternlab-node#547 that passes this option to the template.

[bmuenzenmeyer]

I have no problem with this - as it's got to be the one thing on the PL chrome that users cannot control, and I have heard it come up from other users too.

Typically we try to make any changes to our shared repositories in conjunction with an issue and vote on the spec. I don't think it's as critical to do sohowever since the absence of this feature should still make the ALL button render.

@dmolsen would you like a spec issue for this?

[tommcc]

Thanks @bmuenzenmeyer, I'll keep that in mind for future enhancement ideas. I should probably have a copy of the PHP version running too, so I know if something I'm trying to fix has to do with the spec or just a node bug.

In this case, the value already existed in the default config files, but was unused/not referenced anywhere, so I wasn't sure it was an already-established but not-implemented feature. Hopefully I was interpreting the original intent of that flag correctly, otherwise I'm open to renaming/putting elsewhere in config (and deleting the dummy config value that started this).

[bmuenzenmeyer]

@dmolsen

if i don't hear from you by 11/20 - i am going to accept this

[bmuenzenmeyer]

I knew this was used before... I found an old reference to the key which you can see was a wrapper around other controls. 6bd898c#diff-d4108beafd71e30c5be9d9a05026f01dR111

Since, it has fallen into disuse.

I am in favor of repurposing it for the cause of this PR.