[WebProfilerBundle] Use same color as other icons for the close toolbar btn

Author: ogizanagi

Resources/views/Profiler/toolbar.css.twig

@@ -125,6 +125,7 @@
 
 .sf-toolbarreset .hide-button {
     background: var(--sf-toolbar-gray-800);
+    color: var(--sf-toolbar-gray-300);
     display: block;
     position: absolute;
     top: 2px;