Enhance handleReset functionality and fix async issues

Updated the `handleReset` method in `app.js` to await the
`Swal.fire` call, ensuring proper asynchronous handling.
Added logic to reset editable text form fields and restore
widget backgrounds after signing.

Refactored `app.min.js` to align with changes in `app.js`,
ensuring consistency between the minified and non-minified
versions. Improved code readability and maintainability
across both files.

EnvelopeGenerator.Web/wwwroot/js/app.js

@@ -354,7 +354,7 @@ class App {
     }
 
     async handleReset(event) {
-        const result = Swal.fire({
+        const result = await Swal.fire({
             title: localized.resetConfirmTitle,
             text: localized.resetConfirmText,
             icon: 'question',
@@ -362,7 +362,24 @@ class App {
         })
 
         if (result.isConfirmed) {
-            const result = await deleteAnnotations(this.pdfKit)
+            await deleteAnnotations(this.pdfKit)
+
+            // Reset editable text form field values (Position, City)
+            const allFormFields = await this.pdfKit.getFormFields()
+            const editableFields = allFormFields.filter(f =>
+                f instanceof PSPDFKit.FormFields.TextFormField && !f.readOnly
+            )
+            for (const field of editableFields) {
+                await this.pdfKit.setFormFieldValues({ [field.name]: '' })
+            }
+
+            // Restore widget backgrounds that were made transparent after signing
+            for (const w of this.signatureWidgets) {
+                const pageAnnots = await this.pdfKit.getAnnotations(w.pageIndex)
+                const widgetAnnot = pageAnnots.find(a => a.id === w.id)
+                if (widgetAnnot)
+                    await this.pdfKit.update(widgetAnnot.set('backgroundColor', null))
+            }
         }
 
         return result