Update UI Style

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

@@ -4,20 +4,18 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@color/background">
+    >
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/tool_bar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:background="@color/background_menu"
         android:elevation="5dp"
         android:theme="?attr/actionBarStyle"
         app:contentInsetStartWithNavigation="0dp"
         app:displayHomeAsUp="false"
         app:fitStatusBar="false"
         app:layout_constraintTop_toTopOf="parent"
-        app:popupTheme="@style/AppTheme.PopupOverlay"
         app:titleTextAppearance="@style/ToolbarTitle" />
 
     <io.legado.app.ui.widget.anima.RefreshProgressBar
@@ -38,7 +36,6 @@
         android:id="@+id/ll_bottom_bar"
         android:layout_width="match_parent"
         android:layout_height="36dp"
-        android:background="@color/background"
         android:gravity="center_vertical"
         android:orientation="horizontal"
         android:paddingLeft="10dp"