Panels: Fixed alert icon position in panel header (#17070)

public/sass/components/_panel_table.scss

@@ -123,7 +123,7 @@
 }
 
 .table-panel-table-header-inner {
-  padding: 0.45em 0 0.45em 1.1em;
+  padding: 0.3em 0 0.45em 1.1em;
   text-align: left;
   color: $blue;
   position: absolute;

public/sass/pages/_alerting.scss

@@ -32,7 +32,7 @@
   .panel-alert-icon:before {
     content: '\e611';
     position: relative;
-    top: 5px;
+    top: 1px;
     left: -3px;
   }
 }