fix(annotation): invoke sigature background creation to fix z-index problem

EnvelopeGenerator.Web/wwwroot/js/annotation.js

@@ -2,7 +2,7 @@
 async function createAnnotations(document) {
     const signatures = [];
 
-    for(var element of document.elements) {
+    for (let element of document.elements) {
         const annotParams = await getAnnotationParams(element.left, element.top);
         const page = element.page - 1
 
@@ -27,13 +27,18 @@ async function createAnnotations(document) {
                 name: id_background,
                 annotationIds: PSPDFKit.Immutable.List([annotation_background.id]),
                 value: "",
-                readOnly: false
+                readOnly: true
             });
 
             signatures.push(annotation_background)
             signatures.push(formFieldBackground)
         }
         //#endregion
+    }
+
+    for (let element of document.elements) {
+        const annotParams = await getAnnotationParams(element.left, element.top);
+        const page = element.page - 1
 
         //#region signatures
         const id = PSPDFKit.generateInstantId()