fix: ViewUtils tried to remote Span elements from Labels

Just like with FormattedString this throws an exception

Author: m-abs

nativescript-angular/view-util.ts

@@ -267,7 +267,7 @@ export class ViewUtil {
         } else if (child.nodeName === "DetachedContainer") {
             // Skip - DetachedContainer is... well detached from its parent
             // Used with ListViews and other TemplatedItemsComponent views.
-        } else if (child.nodeName === "FormattedString") {
+        } else if (child.nodeName === "FormattedString" || child.nodeName === "Span") {
             // Removing FormattedString and its Spans from a Label throws an exception
         } else if (isView(parent)) {
             parent._removeView(child);