Custom TinyMCE Styles
Consider replacing current approach with this plugin (still need to remove h1, blockquote, etc from formats)
Custom Admin, TinyMCE, Users | Type: PHP
Restore Gravity Forms Embed Button on TinyMCE
Add to theme functions file. Displays on every WYSIWYG field /*****Restore Gravity Forms Embed Button on TinyMCE*********/ add_filter( 'gform_display_add_form_button', '__return_true' ); More examples on GF Docs
Forms, TinyMCE | Type: PHP
