feat: Globale Konstante isReadOnly-Wert erstellt.

- Constraint für ReadOnly-Schaltfläche mit isReadOnly-Wert hinzugefügt

EnvelopeGenerator.Web/wwwroot/js/ui.js

@@ -61,7 +61,7 @@
   }
 
   static getToolbarItems(instance, handler) {
-    const customItems = UI.getCustomItems(handler)
+    const customItems = UI.getWritableItems(handler)
     const defaultItems = UI.getDefaultItems(instance.toolbarItems)
     return defaultItems.concat(customItems)
   }
@@ -73,22 +73,25 @@
     return el.firstChild
   }
 
-  static getCustomItems = function (callback) {
-    return [
-      {
-        type: 'custom',
-        id: 'button-share',
-        className: 'button-share',
-        title: 'Teilen',
-        onPress() {
-          callback('SHARE')
-        },
-        icon: `<svg width="30" height="30" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  static getWritableItems = function (callback) {
+    const items = new Array();
+    if (!IS_READONLY)
+      items.push(
+        {
+          type: 'custom',
+          id: 'button-share',
+          className: 'button-share',
+          title: 'Teilen',
+          onPress() {
+            callback('SHARE')
+          },
+          icon: `<svg width="30" height="30" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
                 <path d="M20 13V17.5C20 20.5577 16 20.5 12 20.5C8 20.5 4 20.5577 4 17.5V13M12 3L12 15M12 3L16 7M12 3L8 7" stroke="#000000" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
               </svg>`,
-      }
-    ]
-    return [
+        }
+      );
+
+    var otherItmes = [
       {
         type: 'custom',
         id: 'button-reset',
@@ -124,6 +127,8 @@
         },
       },
     ]
+
+    return items;
   }
 
   static getDefaultItems(items) {