Merge branch 'material' into 'master'

tab debug error fix

See merge request upm-packages/ui-widgets/com.unity.uiwidgets!138

Runtime/material/tabs.cs

         }
 
         public readonly _TabBarState tabBar;
+        
+        public override bool applyContentDimensions(float minScrollExtent, float maxScrollExtent) {
+            bool result = true;
+            if (!this.havePixels) {
+                this.correctPixels(this.tabBar._initialScrollOffset(this.viewportDimension, minScrollExtent, maxScrollExtent));
+                result = false;
+            }
+            return base.applyContentDimensions(minScrollExtent, maxScrollExtent) && result;
+        }
     }
 
 
                 position.maxScrollExtent);
         }
 
-        float _initialScrollOffset(float viewportWidth, float minExtent, float maxExtent) {
+        internal float _initialScrollOffset(float viewportWidth, float minExtent, float maxExtent) {
             return this._tabScrollOffset(this._currentIndex, viewportWidth, minExtent, maxExtent);
         }
 

Runtime/widgets/scroll_position.cs

             }
         }
 
-        public bool hasPixles {
+        public bool havePixels {
             get { return this._pixels != null; }
         }