Accordion - hide add and/or delete button(s)

Support
1

If needing to hide the add button in an accordion, you can do this via CSS:

.icon-add.pull-right {
    visibility: hidden;
}

If you want to hide the delete buttons, the simplest way to do this is to change the min and max params. These will accept _calc

"max_calc": "model.maxRows",
"min_calc": "model.minRows",