[Fix] Inventory Item Transfer (#1316)

* Fixed so items from the inventory tab of the Party sheet can be dragged out

* Added transfer logic

* Added translation

* Improved item transfer dialog title

* Simplified title

* Updated image

* Simplified the handlebars templates for itemTransfer

* Improved item-identicial check

* Slight improved rendering

* .

module/applications/dialogs/itemTransfer.mjs

@@ -0,0 +1,70 @@
+const { HandlebarsApplicationMixin, ApplicationV2 } = foundry.applications.api;
+
+export default class ItemTransferDialog extends HandlebarsApplicationMixin(ApplicationV2) {
+    constructor(item) {
+        super({});
+
+        this.item = item;
+        this.quantity = item.system.quantity;
+    }
+
+    get title() {
+        return this.item.name;
+    }
+
+    static DEFAULT_OPTIONS = {
+        tag: 'form',
+        classes: ['daggerheart', 'dh-style', 'dialog', 'item-transfer'],
+        position: { width: 300, height: 'auto' },
+        window: { icon: 'fa-solid fa-hand-holding-hand' },
+        actions: {
+            finish: ItemTransferDialog.#finish
+        },
+        form: { handler: this.updateData, submitOnChange: true, closeOnSubmit: false }
+    };
+
+    static PARTS = {
+        main: { template: 'systems/daggerheart/templates/dialogs/item-transfer.hbs' }
+    };
+
+    _attachPartListeners(partId, htmlElement, options) {
+        super._attachPartListeners(partId, htmlElement, options);
+
+        htmlElement.querySelector('.number-display').addEventListener('change', event => {
+            this.quantity = isNaN(event.target.value) ? this.quantity : Number(event.target.value);
+            this.render();
+        });
+    }
+
+    async _prepareContext(_options) {
+        const context = await super._prepareContext(_options);
+        context.item = this.item;
+        context.quantity = this.quantity;
+
+        return context;
+    }
+
+    static async updateData(_event, _element, formData) {
+        const { quantity } = foundry.utils.expandObject(formData.object);
+        this.quantity = quantity;
+        this.render();
+    }
+
+    static async #finish() {
+        this.close({ submitted: true });
+    }
+
+    close(options = {}) {
+        if (!options.submitted) this.quantity = null;
+
+        super.close();
+    }
+
+    static async configure(item) {
+        return new Promise(resolve => {
+            const app = new this(item);
+            app.addEventListener('close', () => resolve(app.quantity), { once: true });
+            app.render({ force: true });
+        });
+    }
+}