Update Page#visible translation

The visible toggle is used to decide if the pages slug should appear in childrens url-paths.

config/locales/alchemy.en.yml

@@ -482,8 +482,8 @@ en:
     page_restricted: "restricted"
     page_states:
       visible:
-        "true": "Page is visible in navigation."
-        "false": "Page is not visible in navigation."
+        "true": "Slug appears in childrens url-paths."
+        "false": "Slug does not appear in childrens url-paths."
       public:
         "true": "Page is published."
         "false": "Page is unpublished."
@@ -496,7 +496,6 @@ en:
     page_status: "Status"
     page_title: "Title"
     page_type: "Type"
-    page_visible_in_navigation: "visible in the navigation"
     page_was_created: "Was created"
     page_was_updated: "Was updated"
     pages:
@@ -826,7 +825,7 @@ en:
         title: "Title"
         updated_at: "Updated at"
         urlname: "Urlname"
-        visible: "visible in navigation"
+        visible: "slug appears in childrens url-paths"
       alchemy/picture:
         image_file_name: "Filename"
         image_file_height: "Height"

spec/models/alchemy/page_spec.rb

@@ -1727,7 +1727,7 @@ module Alchemy
         end
 
         it "returns a translated status string for visible status" do
-          expect(page.status_title(:visible)).to eq("Page is visible in navigation.")
+          expect(page.status_title(:visible)).to eq("Slug appears in childrens url-paths.")
         end
 
         it "returns a translated status string for locked status" do