TODO: implement skipping from TestController

cmd/pkgserver/ui/static/test.scss

@@ -13,8 +13,33 @@ details.test-node {
     > summary {
         cursor: pointer;
     }
+    &.success > summary::marker {
+        /*
+         * WebKit only supports color and font-size properties in ::marker, and
+         * its ::-webkit-details-marker doesn't seem to work whatsoever; thus,
+         * set a color as a fallback: while it may be confusing for colorblind
+         * individuals, it's better than no indication of a test's state.
+         * See: https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors/::marker#browser_compatibility
+         */
+        color: black;
+        content: url("/static/success-closed.svg");
+    }
+    &.success[open] > summary::marker {
+        content: url("/static/success-open.svg");
+    }
     &.failure > summary::marker {
         color: red;
+        content: url("/static/failure-closed.svg");
+    }
+    &.failure[open] > summary::marker {
+        content: url("/static/failure-open.svg");
+    }
+    &.skip > summary::marker {
+        color: blue;
+        content: url("/static/skip-closed.svg");
+    }
+    &.skip[open] > summary::marker {
+        content: url("/static/skip-open.svg");
     }
 }
 
@@ -26,6 +51,10 @@ p.test-desc {
     }
 }
 
+.hidden {
+    display: none;
+}
+
 .italic {
     font-style: italic;
 }