finish actmode on showing NewItemDialog

app/src/main/kotlin/com/simplemobiletools/notes/pro/fragments/ChecklistFragment.kt

@@ -106,6 +106,7 @@ class ChecklistFragment : NoteFragment(), ChecklistItemsListener {
 
             setOnClickListener {
                 showNewItemDialog()
+                (view.checklist_list.adapter as? ChecklistAdapter)?.finishActMode()
             }
         }