fix(storybook): add missing fetch mocks

ui/src/Styles/DarkTheme.scss

@@ -106,3 +106,7 @@ $datepicker__day-hover-color: $white;
 .modal-content {
   color: $white;
 }
+
+a {
+  color: $link-color;
+}

ui/src/Styles/LightTheme.scss

@@ -92,3 +92,7 @@ $datepicker__day-hover-color: $black;
 @import "Styles/Components/MountFade";
 @import "Styles/Components/NavBarSlide";
 @import "Styles/Components/SilenceModal";
+
+a {
+  color: $link-color;
+}

ui/src/__mocks__/Stories.js

@@ -36,6 +36,13 @@ const MockGroup = (groupName, alertCount, active, suppressed, unprocessed) => {
               value: "this is hidden by default",
               visible: false,
               isLink: false
+            },
+            {
+              name: "linkify",
+              value:
+                "annotation with a link to github.com/prymitive/karma project page",
+              visible: true,
+              isLink: false
             }
           ]
         : [],