Support Native Search (Ghost V5)

[shincurry]

Support Ghost official Native Search feature. #462

• Add new custom setting enable_native_search (Enable native search) in Site-wide group
• New Native Search button keep the same style and position as the old button
• Still keep the old Theme Search feature

[eddiesigner]

Thanks!

This looks good, however, there are a couple of things that can be changed in order to merge this PR:

1. The code added in the file default.hbs is not really necessary, you can remove it

2. In the file partials/header.hbs the search button will be rendered twice in case the new custom setting is enabled because the current button will be still there:

<button class="m-icon-button in-mobile-topbar js-open-search" aria-label="{{t "Open search"}}">
  <span class="icon-search" aria-hidden="true"></span>
</button>
{{#if @custom.enable_native_search}}
  <button class="m-icon-button in-mobile-topbar" data-ghost-search aria-label="{{t "Open search"}}">
    <span class="icon-search" aria-hidden="true"></span>
  </button>
{{/if}}

I would suggest to do something like this:

<button class="m-icon-button in-mobile-topbar {{^if @custom.enable_native_search}}js-open-search{{/if}}" {{#if @custom.enable_native_search}}data-ghost-search{{/if}} aria-label="{{t "Open search"}}">
  <span class="icon-search" aria-hidden="true"></span>
</button>

This way you avoid duplicated code and the button will be rendered only once.