Don't call loadMore except from stream

This causes unnecessary network traffic and momentarily blanks the
ephemeral properties of the annotation set on the client.

h/static/scripts/app-controller.coffee

@@ -121,9 +121,6 @@ module.exports = class AppController
       $scope.accountDialog.visible = false
       identity.logout()
 
-    $scope.loadMore = (number) ->
-      streamer.send({messageType: 'more_hits', moreHits: number})
-
     $scope.clearSelection = ->
       $scope.search.query = ''
       annotationUI.clearSelectedAnnotations()

h/static/scripts/stream-controller.coffee

@@ -51,3 +51,6 @@ module.exports = class StreamController
     $scope.sort.name = 'Newest'
 
     $scope.shouldShowThread = (container) -> true
+
+    $scope.loadMore = (number) ->
+      streamer.send({messageType: 'more_hits', moreHits: number})