REFACTOR: remove unused method on setting sheet

FEAT: create BaseActorSetting
FIX: add type="button" to button on actor's sheet

module/applications/sheets/api/actor-setting.mjs

@@ -0,0 +1,51 @@
+import DHApplicationMixin from './application-mixin.mjs';
+const { DocumentSheetV2 } = foundry.applications.api;
+
+/**@typedef {import('@client/applications/_types.mjs').ApplicationClickAction} ApplicationClickAction */
+
+/**
+ * Base settings sheet for Daggerheart actors.
+ * @extends {DHApplicationMixin<DocumentSheetV2>}
+ */
+export default class DHBaseActorSettings extends DHApplicationMixin(DocumentSheetV2) {
+
+  /**@inheritdoc */
+  static DEFAULT_OPTIONS = {
+    classes: ['dialog'],
+    window: {
+      icon: 'fa-solid fa-wrench',
+      resizable: false,
+      title: "DAGGERHEART.GENERAL.Tabs.settings"
+    },
+    position: { width: 455, height: 'auto' },
+    actions: {},
+    form: {
+      submitOnChange: true,
+    },
+    dragDrop: [
+      { dragSelector: null, dropSelector: '.tab.features' },
+      { dragSelector: '.feature-item', dropSelector: null }
+    ]
+  };
+
+  /** @inheritDoc */
+  _initializeApplicationOptions(options) {
+    options = super._initializeApplicationOptions(options);
+    options.classes = options.classes.filter(c => c !== "sheet");
+    return options;
+  }
+
+  /**@returns {foundry.documents.Actor} */
+  get actor() {
+    return this.document;
+  }
+
+  /**@inheritdoc */
+  async _prepareContext(options) {
+    const context = await super._prepareContext(options);
+    context.systemFields.attack.fields = this.actor.system.attack.schema.fields;
+    context.isNPC = this.actor.isNPC;
+
+    return context
+  }
+}