修复bug

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

@@ -1,15 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/tool_bar"
-        android:background="@color/background_menu"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content" />
+        android:layout_height="wrap_content"
+        android:theme="?attr/actionBarStyle"
+        app:titleTextAppearance="@style/ToolbarTitle"
+        app:popupTheme="@style/AppTheme.PopupOverlay" />
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view"

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

@@ -9,7 +9,6 @@
         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:titleTextAppearance="@style/ToolbarTitle"

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

@@ -1,15 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/tool_bar"
-        android:background="@color/background_menu"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content" />
+        android:layout_height="wrap_content"
+        android:theme="?attr/actionBarStyle"
+        app:titleTextAppearance="@style/ToolbarTitle"
+        app:popupTheme="@style/AppTheme.PopupOverlay" />
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view"