[apps] In curve view, avoid to reload the whole view when reloading

cursor

Change-Id: Ie8c0e100159201cc6b11122eeb567c68092a7b06

apps/banner_view.cpp

@@ -20,6 +20,7 @@ int BannerView::numberOfSubviews() const {
 }
 
 void BannerView::layoutSubviews() {
+  markRectAsDirty(bounds());
   /* We iterate on subviews, adding their width until we exceed the view bound.
   * The last subview that exceeds the bound is recorded as the first subview of
   * the next line. For the current line, we scan again the subviews and frame