see 

  

    

      jenkins/core/src/main/resources/lib/form/repeatableDeleteButton.jelly
    
    

        Lines 35 to 37
      in
      de8256a
    
  
  

    


        

          

          
 <button tooltip="${h.xmlEscape(attrs.value ?: '%Delete')}" class="repeatable-delete danger" type="button"> 
        

        

          

          
   <l:icon src="symbol-close" /> 
        

        

          

          
 </button> 
        
    
  



Like:
  

Instead of the text dismiss like in: