use proper CSS classes.

Author: prwater

src/CoreFlashMessageCollection.php

@@ -79,7 +79,7 @@ public static function compare(FlashMessage $flashMessage1, FlashMessage $flashM
    */
   public function addAssets(): void
   {
-    $this->nub->assets->jsAdmFunctionCall(__CLASS__, 'registerFlashMessage', ['.flash-message']);
+    $this->nub->assets->jsAdmFunctionCall(__CLASS__, 'registerFlashMessage', ['.flash-message-wrapper']);
   }
 
   //--------------------------------------------------------------------------------------------------------------------
@@ -143,7 +143,7 @@ public function htmlFlashMessages(): string
     }
 
     $html = Html::htmlNested(['tag'  => 'div',
-                              'attr' => ['class' => 'flash-messages'],
+                              'attr' => ['class' => 'flash-message-collection'],
                               'html' => $inner]);
 
     $this->cleanFlashMessages();

www/css/Plaisio/FlashMessage/CoreFlashMessageManager.css

@@ -1,4 +1,4 @@
-.flash-messages
+.flash-message-collection
 {
   position: absolute;
   top:      0;