remove obsolete Hypothesis.detail property

Use CSS to hide the reply count in the header for the detail view
and to do the slash delimiter.

h/css/common.scss

@@ -557,6 +557,15 @@ blockquote {
   }
 }
 
+.reply-count {
+  .detail .magicontrols & {
+    display: none;
+  }
+
+  .summary &:after {
+    content: ' /'
+  }
+}
 
 
 //SUMMARY////////////////////////////////

h/js/controllers.coffee

@@ -246,7 +246,7 @@ class Annotation
       $scope.unsaved = true
 
     $scope.directChildren = ->
-      if $scope.$modelValue? and (not annotator.detail) and threading.getContainer($scope.$modelValue.id).children?
+      if $scope.$modelValue? and threading.getContainer($scope.$modelValue.id).children?
         return threading.getContainer($scope.$modelValue.id).children.length
       0
       
@@ -337,9 +337,6 @@ class Viewer
 
     $scope.$on '$routeUpdate', refresh
 
-    $scope.$watch 'detail', (newValue, oldValue) =>
-      annotator.detail = newValue
-
     refresh()
 
   refresh: ($scope, $routeParams, threading, heatmap) =>

h/js/services.coffee

@@ -11,7 +11,6 @@ class Hypothesis extends Annotator
       userString: (user) -> user.replace(/^acct:(.+)@(.+)$/, '$1 on $2')
 
   # Internal state
-  detail: false      # * Whether the viewer shows a summary or detail listing
   visible: false     # * Whether the sidebar is visible
   unsaved_drafts: [] # * Unsaved drafts currenty open