fvtt-ecryme/templates/dialogs/roll-dialog-generic.hbs

<form class="skill-roll-dialog">
  <header class="roll-dialog-header">
    {{#if img}}
    <img class="actor-icon" src="{{img}}" data-edit="img" title="{{name}}" />
    {{/if}}
    <h1 class="dialog-roll-title roll-dialog-header">{{title}}</h1>
  </header>

  <div class="flexcol">

    {{> systems/fvtt-ecryme/templates/dialogs/partial-common-roll-dialog.hbs}}

    <div class="flexrow">
      <span class="roll-dialog-label">Difficulté : </span>
      <select class="" type="text" id="roll-difficulty" value="{{difficulty}}" data-dtype="Number">
        {{#select difficulty}}
        {{#each config.difficulty as |diffData value| }}
        <option value="{{diffData.value}}">{{localize diffData.difficulty}} / {{localize diffData.frequency}}
          ({{diffData.value}})</option>
        {{/each}}
        {{/select}}
      </select>
    </div>

  </div>

</form>