Fix filter chicklet color persistence in focus state (#9109)

Preserve chicklet colors when focused by adding :focus and :active
pseudo-classes to the data-status selector. This prevents the white
flash that occurred when clicking a filter chicklet and moving the
mouse away.

Related to #8996

Author: JohanLorenzo

ui/css/treeherder-navbar.css

@@ -189,7 +189,9 @@ secondary-nav-bar {
 
 /* Filter chicklets - use data attributes with shared color tokens */
 .btn-view-nav[data-status],
-.btn-view-nav[data-status]:hover {
+.btn-view-nav[data-status]:hover,
+.btn-view-nav[data-status]:focus,
+.btn-view-nav[data-status]:active {
   --bs-btn-color: var(--chicklet-color);
   --bs-btn-hover-color: var(--chicklet-color);
   --bs-btn-active-color: var(--chicklet-color);