refactor(navbar): improved navbar transitions

ionic/components/app/app.ts

@@ -111,7 +111,6 @@ export class IonicApp {
    * @return {bool}
    */
   isTransitioning() {
-    console.debug('isTransitioning', (this._trnsTime > Date.now()), this._trnsTime, Date.now())
     return (this._trnsTime > Date.now());
   }
 

ionic/components/app/structure.scss

@@ -13,6 +13,7 @@ $z-index-navbar-container:       10;
 
 $z-index-content:                5;
 $z-index-toolbar:                10;
+$z-index-toolbar-background:     -1;
 
 $z-index-toolbar-border:         20;
 $z-index-list-border:            50;
@@ -139,7 +140,7 @@ ion-view {
   height: 100%;
   flex-direction: column;
 
-  background-color: white;
+  background-color: $background-color;
 
   transform: translateZ(0px);
 }

ionic/components/app/typography.scss

@@ -35,7 +35,7 @@ a {
   background-color: transparent;
 }
 .enable-hover a:hover {
-  color: $link-hover-color;
+  opacity: 0.7;
 }
 
 h1, h2, h3, h4, h5, h6 {