Added missing ForkModal.

app/templates/editor/fork-modal.jade

@@ -0,0 +1,17 @@
+extends /templates/modal/modal_base
+
+block modal-header-content
+  h3(data-i18n="editor.fork_title") Fork New Version
+
+block modal-body-content
+  form.form
+    .form-group
+      label(for="model-name", data-i18n="general.name") Name
+      input#fork-model-name(name="name", type="text").form-control
+
+block modal-footer-content
+  button.btn(data-dismiss="modal", data-i18n="common.cancel") Cancel
+  button.btn.btn-primary#fork-model-confirm-button(data-i18n="common.save") Save
+    
+block modal-body-wait-content
+  h3(data-i18n="editor.fork_creating") Creating Fork...

app/views/editor/ForkModal.coffee

@@ -0,0 +1,43 @@
+ModalView = require 'views/kinds/ModalView'
+template = require 'templates/editor/fork-modal'
+forms = require 'lib/forms'
+
+module.exports = class ForkModal extends ModalView
+  id: 'fork-modal'
+  template: template
+  instant: false
+  modalWidthPercent: 60
+
+  events:
+    'click #fork-model-confirm-button': 'forkModel'
+    'submit form': 'forkModel'
+
+  constructor: (options) ->
+    super options
+    @editorPath = options.editorPath  # like 'level' or 'thang'
+    @model = options.model
+    @modelClass = @model.constructor
+
+  forkModel: ->
+    @showLoading()
+    forms.clearFormAlerts(@$el)
+    newModel = new @modelClass($.extend(true, {}, @model.attributes))
+    newModel.unset '_id'
+    newModel.unset 'version'
+    newModel.unset 'creator'
+    newModel.unset 'created'
+    newModel.unset 'original'
+    newModel.unset 'parent'
+    newModel.set 'commitMessage', "Forked from #{@model.get('name')}"
+    newModel.set 'name', @$el.find('#fork-model-name').val()
+    if @model.get 'permissions'
+      newModel.set 'permissions', [access: 'owner', target: me.id]
+    newPathPrefix = "editor/#{@editorPath}/"
+    res = newModel.save()
+    return unless res
+    res.error =>
+      @hideLoading()
+      forms.applyErrorsToForm(@$el.find('form'), JSON.parse(res.responseText))
+    res.success =>
+      @hide()
+      application.router.navigate(newPathPrefix + newModel.get('slug'), {trigger: true})