Use the correct accent color for widget size slider

app/src/main/res/layout/widgets_page.xml

@@ -95,8 +95,8 @@
             android:layout_marginRight="8dp"
             android:layout_toLeftOf="@id/max_label"
             android:layout_toEndOf="@id/min_label"
-            android:thumbTint="@android:color/white"
-            android:progressTint="@android:color/white" />
+            android:thumbTint="@color/accent_color"
+            android:progressTint="@color/accent_color" />
 
         <TextView
             android:id="@+id/max_label"

app/src/main/res/values/colors.xml

@@ -33,4 +33,5 @@
     <color name="folder_preview_background_color">#4dcbcbcb</color>
     <color name="dock_background_color">#26ffffff</color>
 
+    <color name="accent_color">#0086FF</color>
 </resources>