Merge pull request #331 from UnityTech/fix_bottom_navi_bar_item_bug

Fix bottom navi bar item bug

Runtime/material/bottom_navigation_bar.cs

                     child: text
                 );
             }
-            else if (this.showUnselectedLabels) {
+            else if (!this.showUnselectedLabels) {
                 text = new FadeTransition(
                     opacity: this.animation,
                     child: text
             Color backgroundColor = null;
             switch (this.widget.type) {
                 case BottomNavigationBarType.fix:
+                    backgroundColor = this.widget.backgroundColor;
                     break;
                 case BottomNavigationBarType.shifting:
                     backgroundColor = this._backgroundColor;