[A11y] Improved contrast of focus outline on elements in the header and footer (#9032)

Author: advay26

src/Bootstrap/dist/css/bootstrap-theme.css

@@ -21,6 +21,11 @@
   @media (min-width: @grid-float-breakpoint) {
     border-radius: @navbar-border-radius;
   }
+
+  a:focus {
+    outline: 4px solid white;
+    outline-offset: -2px;
+  }
 }
 
 

src/Bootstrap/dist/css/bootstrap.css

@@ -83,6 +83,11 @@ body {
 
   a {
     color: @panel-footer-color;
+
+    &:focus {
+      outline: 3px solid white;
+      outline-offset: 2px;
+    }
   }
 
   .footer-release-info {