Resolve crashes on Android 2.3 due to ActionBarCompat conversion

OpenPGP-Keychain/src/main/res/layout/api_app_settings_activity.xml

@@ -3,8 +3,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:layout_marginLeft="16dp"
-    android:layout_marginRight="16dp"
+    android:paddingLeft="16dp"
+    android:paddingRight="16dp"
     android:orientation="vertical" >
 
     <fragment

OpenPGP-Keychain/src/main/res/layout/edit_key_activity.xml

@@ -1,20 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!--
-     Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-
 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:bootstrapbutton="http://schemas.android.com/apk/res-auto"
     android:layout_width="fill_parent"