TableBuilder: Make destroy link in gear menu render correctly

Previously we weren't correctly outputting the proper HTML to get the
:delete link rendering correctly with the icon and text. It should show:

    [TRASH CAN ICON] Supprimer

but instead was showing the href.

To get this working, I added a `@content` attribute to `Link`. This
allows us to optionally specify non-text content to display in the link.

We then have delete-link-specific handling when rendering the gear
menu's HTML. In that particular case, the `<li>` needs to have a
'delete-action' class in order for the styling to work properly.

Created a new `destroy_link` helper method to allow us to reuse the
destroy link content in the header bar.

TODO: Collect Link#content and Link#name into the same property.
TODO: Rename `#destroy_link` to `#destroy_link_content`

Refs #3479

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/link.rb b/lib/link.rb
index c875b85ac..3ce12ae24 100644
--- a/lib/link.rb
+++ b/lib/link.rb
@@ -1,10 +1,11 @@
 class Link
-  attr_reader :name, :href, :method, :data
+  attr_reader :name, :href, :method, :data, :content
 
-  def initialize(name: nil, href:, method: nil, data: nil)
+  def initialize(name: nil, href:, method: nil, data: nil, content: nil)
     @name = name
     @href = href
     @method = method
     @data = data
+    @content = content
   end
 end