Add link to timeout overriding documentation from job page sidebar

app/assets/javascripts/jobs/components/sidebar_detail_row.vue

@@ -11,11 +11,19 @@
         type: String,
         required: true,
       },
+      helpUrl: {
+        type: String,
+        required: false,
+        default: '',
+      },
     },
     computed: {
       hasTitle() {
         return this.title.length > 0;
       },
+      hasHelpURL() {
+        return this.helpUrl.length > 0;
+      },
     },
   };
 </script>
@@ -28,5 +36,17 @@
       {{ title }}:
     </span>
     {{ value }}
+
+    <span
+      v-if="hasHelpURL"
+      class="help-button pull-right"
+    >
+      <a
+        :href="helpUrl"
+        target="_blank"
+      >
+        <i class="fa fa-question-circle"></i>
+      </a>
+    </span>
   </p>
 </template>

app/assets/javascripts/jobs/components/sidebar_details_block.vue

@@ -127,6 +127,7 @@
           class="js-job-timeout"
           v-if="job.timeout"
           title="Timeout"
+          help-url="/help/ci/runners/README.html#setting-maximum-job-timeout-for-a-runner"
           :value="timeout"
         />
         <detail-row