Some layout improvements and fixes

app/src/main/res/drawable-v21/bg_swipe_item_left.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+       Copyright (C) 2015 Haruki Hasegawa
+
+       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.
+-->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <color android:color="@color/bg_swipe_item_trash"/>
+    </item>
+    <item
+        android:drawable="@drawable/ic_item_swipe_trash"
+        android:gravity="right|center_vertical"
+        android:right="16dp"/>
+</layer-list>

app/src/main/res/drawable-v21/bg_swipe_item_right.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+       Copyright (C) 2015 Haruki Hasegawa
+
+       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.
+-->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <color android:color="@color/bg_swipe_item_archive"/>
+    </item>
+    <item
+        android:drawable="@drawable/ic_item_swipe_archive"
+        android:gravity="left|center_vertical"
+        android:left="16dp"/>
+</layer-list>