* Email templates
* Campaigns: Displaying contact list contacts and failed/invalid contacts, completed changes for new campaign, removed firstname and lastname as required and added title as required in leads create page, completed changes for Campaign email send with attachment.
* Added mentions in comments section for all modules, added email templates when assigning a case or account, changed validation error messages in documents create and edit pages, added thumbnails for attachments in all detail pages
* added tags field for campaign, changed styles for marketing module, added loading spinner and validation for file fields in campaign list create page, changes in marketing module
