Finish implementation of habit archival

app/src/main/res/menu/list_habits_context.xml

@@ -5,9 +5,15 @@
         android:id="@+id/action_edit_habit"
         android:title="@string/edit">
     </item>
+
     <item
         android:id="@+id/action_archive_habit"
         android:title="@string/archive">
     </item>
 
+    <item
+        android:id="@+id/action_unarchive_habit"
+        android:title="@string/unarchive">
+    </item>
+
 </menu>

app/src/main/res/menu/list_habits_menu.xml

@@ -2,6 +2,11 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:context="org.isoron.uhabits.MainActivity" >
 
+    <item android:id="@+id/action_show_archived"
+          android:title="Show archived"
+          android:enabled="true"
+          android:checkable="true" />
+
     <item
         android:id="@+id/action_settings"
         android:orderInCategory="100"

app/src/main/res/menu/show_habit_menu.xml

@@ -2,6 +2,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:context="org.isoron.uhabits.ShowHabitActivity" >
 
+
     <item
         android:id="@+id/action_settings"
         android:orderInCategory="100"

app/src/main/res/values-v21/styles.xml

@@ -9,6 +9,10 @@
         <item name="android:windowContentTransitions">true</item>
         <item name="android:windowAllowEnterTransitionOverlap">true</item>
         <item name="android:windowAllowReturnTransitionOverlap">true</item>
+        <item name="android:actionBarPopupTheme">@style/actionBarStyle</item>
+    </style>
+
+    <style name="actionBarStyle" parent="android:ThemeOverlay.Material.Light">
     </style>
 
     <style name="MyDialogStyle" parent="android:Theme.Material.Light.Dialog">

app/src/main/res/values/strings.xml

@@ -6,6 +6,7 @@
     <string name="edit">Edit</string>
     <string name="delete">Delete</string>
     <string name="archive">Archive</string>
+    <string name="unarchive">Unarchive</string>
     <string name="add_habit">Add habit</string>
     <string name="color_picker_default_title">Select a Color</string>
     <string name="color_swatch_description">Color <xliff:g id="color_index" example="14">%1$d</xliff:g></string>