Replace depricated checkmark box icon with check square outline version

app/models/panda/project-instance-action.coffee

@@ -35,7 +35,7 @@ export default DS.Model.extend
       when 'timestamp'
         @get('timestamp_value')?.format('LLL')
       when 'boolean'
-        cls = if @get('boolean_value') then 'checkmark box' else 'square outline'
+        cls = if @get('boolean_value') then 'check square outline' else 'square outline'
         "<i class='#{cls} icon'></i>".htmlSafe()
 
   string_comparison_value: Ember.computed 'workflow_action_definition.value_type', '{string_value,number_value,text_value,date_value,timestamp_value,boolean_value}', ->

app/templates/components/project/instance-action-value-display.emblem

@@ -1,6 +1,6 @@
 if (eq value_type 'boolean')
   if project_instance_action.boolean_value
-    i.checkmark.box.icon
+    i.check.square.outline.icon
   else
     i.square.outline.value-missing.icon
 else if (eq value_type 'date')

app/templates/project/show/-dunlop-project-info.emblem

@@ -35,7 +35,7 @@ if (eq tab 'identifiers')
             td= workflow_action_definition.identifier
             td
               if workflow_action_definition.completes_group
-                i.checkmark.box.icon
+                i.check.square.outline.icon
 
   if model.project_scenarios.length
     .ui.horizontal.divider= t 'models.plural.project_scenario'

app/templates/workflow-action-definition/-edit-workflow-action-definition.emblem

@@ -108,7 +108,7 @@ if offset_type_attached
               .item data-value=''
                 i.square.outline.icon
               .item data-value='true'
-                i.checkmark.box.icon
+                i.check.square.outline.icon
         else if (eq attached_to_workflow_action.value_type 'select')
           = ui-dropdown selected=attached_to_connection_conditional_base_value onChange=(action (mut attached_to_connection_conditional_base_value))
             span.default.text -