Sidebar customisation improvements

[allmarkedup]

This PR adds config options to:

• Customise the order of the nav panels in the sidebar
• Hide or show the search/filter box for both previews and pages

Sidebar panel order

This PR adds a preview_inspector.sidebar_panels config option that allows for the reordering (or omitting) of section panels in the Lookbook sidebar.

config.lookbook.preview_inspector.sidebar_panels = [:pages, :previews]

The default value is [:previews, :pages]. Documentation here

Search/filter inputs

This PR adds preview_search and page_search config options to hide or show the filter box UI for previews and pages respectively.

config.lookbook.preview_search = false # default: true 
config.lookbook.page_search = true # default: false

For backwards compatibility preview search is enabled by default, but pages search is not.

Documentation for pages and previews.

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[cody-clio]

@allmarkedup I've pulled the gem locally, and I can see that the section configuration is working, but I do not see the search appearing.

Configuration setup:

config.lookbook.preview_inspector.sidebar_panels = [:pages, :previews]
config.lookbook.preview_search = true
config.lookbook.page_search = true

Even if I disable all the configurations, I'm not seeing the search show up any longer:

[allmarkedup]

@cody-clio argh sorry, my bad, I was rushing things to get the PR up before I had to head out and made a stupid typo. Should be fixed now!

[cody-clio]

Looks great! Thanks for making these changes! Excited to use them.

[allmarkedup]

@cody-clio Awesome, thanks for the feature requests that prodded me into action :) I'll merge this now and hopefully get a new release out in the next day or two.