Remove unused and duplicate strings

Change-Id: I7e1a3120e66ca8bc3adab65499663fecb5b041a3
diff --git a/res/xml/bandwidth_preferences.xml b/res/xml/bandwidth_preferences.xml
index a31d0e8..b7f26f9 100644
--- a/res/xml/bandwidth_preferences.xml
+++ b/res/xml/bandwidth_preferences.xml
@@ -20,17 +20,17 @@
         android:key="preload_when"
         android:title="@string/pref_data_preload_title"
         android:summary="@string/pref_data_preload_summary"
-        android:entries="@array/pref_data_preload_choices"
+        android:entries="@array/pref_temporal_choices"
         android:entryValues="@array/pref_data_preload_values"
-        android:dialogTitle="@string/pref_data_preload_dialogtitle" />
+        android:dialogTitle="@string/pref_data_preload_title" />
 
     <ListPreference
         android:key="link_prefetch_when"
         android:title="@string/pref_link_prefetch_title"
         android:summary="@string/pref_link_prefetch_summary"
-        android:entries="@array/pref_link_prefetch_choices"
+        android:entries="@array/pref_temporal_choices"
         android:entryValues="@array/pref_link_prefetch_values"
-        android:dialogTitle="@string/pref_link_prefetch_dialogtitle" />
+        android:dialogTitle="@string/pref_link_prefetch_title" />
 
     <SwitchPreference
         android:key="load_images"
diff --git a/res/xml/bookmarks_searchable.xml b/res/xml/bookmarks_searchable.xml
index 8b83f26..b10fa86 100644
--- a/res/xml/bookmarks_searchable.xml
+++ b/res/xml/bookmarks_searchable.xml
@@ -15,7 +15,7 @@
 -->
 
 <searchable xmlns:android="http://schemas.android.com/apk/res/android"
-    android:label="@string/bookmarks_search"
+    android:label="@string/application_name"
     android:searchButtonText="@string/search_button_text"
     android:searchMode="queryRewriteFromData"
     android:inputType="textUri"
diff --git a/res/xml/content_preferences.xml b/res/xml/content_preferences.xml
index 68fc90a..3b33a69 100644
--- a/res/xml/content_preferences.xml
+++ b/res/xml/content_preferences.xml
@@ -51,7 +51,7 @@
         android:layout="@layout/swe_preference"
         android:widgetLayout="@layout/swe_preference_list_widget"
         android:defaultValue="@string/pref_default_text_encoding_default"
-        android:dialogTitle="@string/pref_default_text_encoding_dialogtitle"
+        android:dialogTitle="@string/pref_default_text_encoding"
         android:entries="@array/pref_default_text_encoding_choices"
         android:entryValues="@array/pref_default_text_encoding_values"
         android:key="default_text_encoding"
diff --git a/res/xml/privacy_and_security_preferences.xml b/res/xml/privacy_and_security_preferences.xml
index 89c40a9..888634d 100644
--- a/res/xml/privacy_and_security_preferences.xml
+++ b/res/xml/privacy_and_security_preferences.xml
@@ -73,7 +73,7 @@
                 android:defaultValue="true"
                 android:key="privacy_clear_history"
                 android:summary="@string/pref_privacy_clear_history_summary"
-                android:title="@string/pref_privacy_clear_history" />
+                android:title="@string/history" />
 
             <CheckBoxPreference
                 android:defaultValue="true"