"Up" buttons for PhraseEditor and PhraseList activities.

app/src/main/AndroidManifest.xml

@@ -279,10 +279,21 @@
         <activity
             android:name="com.xabber.android.ui.preferences.PhraseList"
             android:label="@string/events_phrases_title"
-            />
+            android:parentActivityName="com.xabber.android.ui.preferences.PreferenceEditor">
+            <!-- Parent activity meta-data to support 4.0 and lower -->
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value="com.xabber.android.ui.preferences.PreferenceEditor" />
+        </activity>
         <activity
             android:name="com.xabber.android.ui.preferences.PhraseEditor"
-            />
+            android:parentActivityName="com.xabber.android.ui.preferences.PhraseList">
+            <!-- Parent activity meta-data to support 4.0 and lower -->
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value="com.xabber.android.ui.preferences.PhraseList" />
+        </activity>
+
         <activity
             android:name="com.xabber.android.ui.ReconnectionActivity"
             />

app/src/main/java/com/xabber/android/ui/preferences/PhraseEditor.java

@@ -36,7 +36,14 @@ public class PhraseEditor extends BaseSettingsActivity {
 
 	private Phrase phrase;
 
-	@Override
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        getActionBar().setDisplayHomeAsUpEnabled(true);
+    }
+
+    @Override
 	protected void onInflate(Bundle savedInstanceState) {
 		addPreferencesFromResource(R.xml.phrase_editor);
 		Integer index = getPhraseIndex(getIntent());

app/src/main/java/com/xabber/android/ui/preferences/PhraseList.java

@@ -27,7 +27,14 @@ import com.xabber.androiddev.R;
 
 public class PhraseList extends BaseListEditor<Integer> {
 
-	@Override
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        getActionBar().setDisplayHomeAsUpEnabled(true);
+    }
+
+    @Override
 	protected int getAddTextResourceId() {
 		return R.string.phrase_add;
 	}