Show Grafana version and build in Help menu

* establishes Help as the single place to look for the Grafana version
* version is passed as menu sub-title to side menu
* added rendering of sub-title, plus styles
* sub-title was used by profile menu (its value is the login string),
but was not shown; now showing this value on condition that login name
is different from user name

pkg/api/index.go

@@ -118,9 +118,14 @@ func setIndexViewData(c *m.ReqContext) (*dtos.IndexViewData, error) {
 	})
 
 	if c.IsSignedIn {
+		// Only set login if it's different from the name
+		var login string
+		if c.SignedInUser.Login != c.SignedInUser.NameOrFallback() {
+			login = c.SignedInUser.Login
+		}
 		profileNode := &dtos.NavLink{
 			Text:         c.SignedInUser.NameOrFallback(),
-			SubTitle:     c.SignedInUser.Login,
+			SubTitle:     login,
 			Id:           "profile",
 			Img:          data.User.GravatarUrl,
 			Url:          setting.AppSubUrl + "/profile",
@@ -284,6 +289,7 @@ func setIndexViewData(c *m.ReqContext) (*dtos.IndexViewData, error) {
 
 	data.NavTree = append(data.NavTree, &dtos.NavLink{
 		Text:         "Help",
+		SubTitle:     fmt.Sprintf(`Grafana version: %s+%s`, setting.BuildVersion, setting.BuildCommit),
 		Id:           "help",
 		Url:          "#",
 		Icon:         "gicon gicon-question",

public/app/core/components/sidemenu/sidemenu.html

@@ -70,9 +70,12 @@
           {{::child.text}}
         </a>
       </li>
+      <li ng-if="item.subTitle" class="side-menu-subtitle">
+        <span class="sidemenu-item-text">{{::item.subTitle}}</span>
+      </li>
       <li class="side-menu-header">
         <span class="sidemenu-item-text">{{::item.text}}</span>
       </li>
     </ul>
   </div>
-</div>
+</div>

public/sass/components/_sidemenu.scss

@@ -149,6 +149,14 @@
   color: #ebedf2;
 }
 
+.side-menu-subtitle {
+  padding: 0.5rem 0.5rem 0.5rem 1rem;
+  font-size: $font-size-sm;
+  color: $text-color-weak;
+  border-top: 1px solid $dropdownDividerBottom;
+  margin-top: 0.25rem;
+}
+
 li.sidemenu-org-switcher {
   border-bottom: 1px solid $dropdownDividerBottom;
 }