fix(showcase): adjust subtitle style

Author: nivekcode

projects/ng-sortgrid-demo/src/app/shared/nav/nav.component.css

@@ -13,3 +13,10 @@
   color: #c30230;
   font-size: 40px;
 }
+
+.subtitle {
+  color: darkgray;
+  display: block;
+  margin-left: 50px;
+  font-style: italic;
+}

projects/ng-sortgrid-demo/src/app/shared/nav/nav.component.html

@@ -4,7 +4,7 @@
   <div class="container">
     <a class="navbar-brand" href="#" style="font-size: 30px">
       <img class="logo" src="assets/ng-sortgrid-logo.png"/>
-      <small *ngIf="subtitle">{{subtitle}}</small>
+      <small class="subtitle" *ngIf="subtitle">{{subtitle}}</small>
     </a>
     <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive"
             aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">