BUG Re-added singular/plural name i18n entities

Previously "hidden" by inability of i18nTextCollector
to autoload classes in order to introspect them.

lang/en.yml

@@ -26,7 +26,7 @@ en:
     MENUTITLE: Files
   AssetAdmin_DeleteBatchAction:
     TITLE: 'Delete folders'
-  AssetAdmin_Tools.ss:
+  AssetAdmin_Tools:
     FILTER: Filter
   AssetAdmin_left.ss:
     GO: Go
@@ -35,10 +35,6 @@ en:
     PAGES: page(s)
   BackLink_Button.ss:
     Back: Back
-  BasicFieldsTestPage:
-    DESCRIPTION: 'Generic content page'
-  BigFamilyPage:
-    DESCRIPTION: 'Generic content page'
   BrokenLinksReport:
     Any: Any
     BROKENLINKS: 'Broken links report'
@@ -156,8 +152,6 @@ en:
     Title: 'All pages, including deleted'
   CMSSiteTreeFilter_Search:
     Title: 'All pages'
-  CaseStudy:
-    DESCRIPTION: 'Case study page to fature work examples'
   ContentControl:
     NOTEWONTBESHOWN: 'Note: this message will not be shown to your visitors'
   ContentController:
@@ -211,14 +205,14 @@ en:
     DEFAULTSERVERERRORPAGETITLE: 'Server error'
     DESCRIPTION: 'Custom content for different error cases (e.g. "Page not found")'
     ERRORFILEPROBLEM: 'Error opening file "{filename}" for writing. Please check file permissions.'
+    PLURALNAME: 'Error Pags'
+    SINGULARNAME: 'Error Page'
   Folder:
     AddFolderButton: 'Add folder'
     DELETEUNUSEDTHUMBNAILS: 'Delete unused thumbnails'
     UNUSEDFILESTITLE: 'Unused files'
     UNUSEDTHUMBNAILSTITLE: 'Unused thumbnails'
     UploadFilesButton: Upload
-  GridFieldTestPage:
-    DESCRIPTION: 'Generic content page'
   LeftAndMain:
     DELETED: Deleted.
     PreviewButton: Preview
@@ -226,8 +220,6 @@ en:
     STATUSPUBLISHEDSUCCESS: 'Published ''{title}'' successfully'
     SearchResults: 'Search Results'
     VersionUnknown: Unknown
-  LegacyTableFieldsTestPage:
-    DESCRIPTION: 'Generic content page'
   Page:
     DESCRIPTION: 'Generic content page'
   Permission:
@@ -235,17 +227,21 @@ en:
   Permissions:
     CONTENT_CATEGORY: 'Content permissions'
     PERMISSIONS_CATEGORY: 'Roles and access permissions'
+  Project:
+    DESCRIPTION: 'Generic content page'
+  ProjectsHolder:
+    DESCRIPTION: 'Generic content page'
   RedirectorPage:
     DESCRIPTION: 'Redirects to a different internal page'
     HASBEENSETUP: 'A redirector page has been set up without anywhere to redirect to.'
     HEADER: 'This page will redirect users to another page'
     OTHERURL: 'Other website URL'
+    PLURALNAME: 'Redirector Pags'
     REDIRECTTO: 'Redirect to'
     REDIRECTTOEXTERNAL: 'Another website'
     REDIRECTTOPAGE: 'A page on your website'
+    SINGULARNAME: 'Redirector Page'
     YOURPAGE: 'Page on your website'
-  RelationFieldsTestPage:
-    DESCRIPTION: 'Generic content page'
   ReportAdminForm:
     FILTERBY: 'Filter by'
   SearchForm:
@@ -274,6 +270,8 @@ en:
     EDITHEADER: 'Who can edit pages on this site?'
     EDIT_PERMISSION: 'Manage site configuration'
     EDIT_PERMISSION_HELP: 'Ability to edit global access settings/top-level page permissions.'
+    PLURALNAME: 'Site Configs'
+    SINGULARNAME: 'Site Config'
     SITENAMEDEFAULT: 'Your Site Name'
     SITETAGLINE: 'Site Tagline/Slogan'
     SITETITLE: 'Site title'
@@ -389,10 +387,6 @@ en:
     VIEWLAST: 'View last'
     VIEWNEXT: 'View next'
     VIEWPREVIOUS: 'View previous'
-  TestFileUploadPage:
-    DESCRIPTION: 'Generic content page'
-  TestPage:
-    DESCRIPTION: 'Generic content page'
   TreeTools:
     DisplayLabel: 'Display:'
   ViewArchivedEmail.ss: