Update UI Style

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

@@ -4,6 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:background="?attr/selectableItemBackground"
     android:padding="8dp">
 
     <io.legado.app.lib.theme.view.ThemeCheckBox
@@ -27,7 +28,6 @@
         android:layout_height="wrap_content"
         android:padding="8dp"
         android:singleLine="true"
-        android:textColor="@color/secondaryText"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintHorizontal_chainStyle="packed"
         app:layout_constraintLeft_toRightOf="@id/cb_source_name"
@@ -39,10 +39,8 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginEnd="12dp"
-        android:background="?attr/selectableItemBackground"
         android:padding="8dp"
         android:text="@string/open"
-        android:textColor="@color/secondaryText"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />