fix: Update default button text handling and improve demo example in dees-form-submit

ts_web/elements/dees-button.ts

@@ -181,7 +181,7 @@ export class DeesButton extends DeesElement {
         ${this.status === 'normal' ? html``: html`
           <dees-spinner .bnw=${true} status="${this.status}"></dees-spinner>
         `}
-        <div class="textbox">${this.text ? this.text : this.textContent}</div>
+        <div class="textbox">${this.text || html`<slot>Button</slot>`}</div>
       </div>
     `;
   }
@@ -202,9 +202,6 @@ export class DeesButton extends DeesElement {
   }
 
   public async firstUpdated() {
-    if (!this.textContent) {
-      this.textContent = 'Button';
-      this.performUpdate();
-    }
+    // Don't set default text here as it interferes with slotted content
   }
 }