diff --git a/lib/private/activitymanager.php b/lib/private/activitymanager.php
index ee7059d492..24acb5d5f6 100644
--- a/lib/private/activitymanager.php
+++ b/lib/private/activitymanager.php
@@ -121,28 +121,6 @@ class ActivityManager implements IManager {
 		return $notificationTypes;
 	}
 
-	/**
-	 * @param array $types
-	 * @param string $filter
-	 * @return array
-	 */
-	function filterNotificationTypes($types, $filter) {
-		if (!$this->isFilterValid($filter)) {
-			return $types;
-		}
-
-		foreach($this->extensions as $extension) {
-			$c = $extension();
-			if ($c instanceof IExtension) {
-				$result = $c->filterNotificationTypes($types, $filter);
-				if (is_array($result)) {
-					$types = $result;
-				}
-			}
-		}
-		return $types;
-	}
-
 	/**
 	 * @param string $method
 	 * @return array
@@ -161,6 +139,30 @@ class ActivityManager implements IManager {
 		return $defaultTypes;
 	}
 
+	/**
+	 * @param string $type
+	 * @return string
+	 */
+	function getTypeIcon($type) {
+		if (isset($this->typeIcons[$type])) {
+			return $this->typeIcons[$type];
+		}
+
+		foreach($this->extensions as $extension) {
+			$c = $extension();
+			if ($c instanceof IExtension) {
+				$icon = $c->getTypeIcon($type);
+				if (is_string($icon)) {
+					$this->typeIcons[$type] = $icon;
+					return $icon;
+				}
+			}
+		}
+
+		$this->typeIcons[$type] = '';
+		return '';
+	}
+
 	/**
 	 * @param string $app
 	 * @param string $text
@@ -213,30 +215,6 @@ class ActivityManager implements IManager {
 		return false;
 	}
 
-	/**
-	 * @param string $type
-	 * @return string
-	 */
-	function getTypeIcon($type) {
-		if (isset($this->typeIcons[$type])) {
-			return $this->typeIcons[$type];
-		}
-
-		foreach($this->extensions as $extension) {
-			$c = $extension();
-			if ($c instanceof IExtension) {
-				$icon = $c->getTypeIcon($type);
-				if (is_string($icon)) {
-					$this->typeIcons[$type] = $icon;
-					return $icon;
-				}
-			}
-		}
-
-		$this->typeIcons[$type] = '';
-		return '';
-	}
-
 	/**
 	 * @param array $activity
 	 * @return integer|false
@@ -300,6 +278,28 @@ class ActivityManager implements IManager {
 		return false;
 	}
 
+	/**
+	 * @param array $types
+	 * @param string $filter
+	 * @return array
+	 */
+	function filterNotificationTypes($types, $filter) {
+		if (!$this->isFilterValid($filter)) {
+			return $types;
+		}
+
+		foreach($this->extensions as $extension) {
+			$c = $extension();
+			if ($c instanceof IExtension) {
+				$result = $c->filterNotificationTypes($types, $filter);
+				if (is_array($result)) {
+					$types = $result;
+				}
+			}
+		}
+		return $types;
+	}
+
 	/**
 	 * @param string $filter
 	 * @return array
diff --git a/lib/public/activity/iextension.php b/lib/public/activity/iextension.php
index 1b405ad8d3..0f6c3c5f8a 100644
--- a/lib/public/activity/iextension.php
+++ b/lib/public/activity/iextension.php
@@ -46,16 +46,6 @@ interface IExtension {
 	 */
 	public function getNotificationTypes($languageCode);
 
-	/**
-	 * The extension can filter the types based on the filter if required.
-	 * In case no filter is to be applied false is to be returned unchanged.
-	 *
-	 * @param array $types
-	 * @param string $filter
-	 * @return array|false
-	 */
-	public function filterNotificationTypes($types, $filter);
-
 	/**
 	 * For a given method additional types to be displayed in the settings can be returned.
 	 * In case no additional types are to be added false is to be returned.
@@ -65,6 +55,15 @@ interface IExtension {
 	 */
 	public function getDefaultTypes($method);
 
+	/**
+	 * A string naming the css class for the icon to be used can be returned.
+	 * If no icon is known for the given type false is to be returned.
+	 *
+	 * @param string $type
+	 * @return string|false
+	 */
+	public function getTypeIcon($type);
+
 	/**
 	 * The extension can translate a given message to the requested languages.
 	 * If no translation is available false is to be returned.
@@ -92,15 +91,6 @@ interface IExtension {
 	 */
 	function getSpecialParameterList($app, $text);
 
-	/**
-	 * A string naming the css class for the icon to be used can be returned.
-	 * If no icon is known for the given type false is to be returned.
-	 *
-	 * @param string $type
-	 * @return string|false
-	 */
-	public function getTypeIcon($type);
-
 	/**
 	 * The extension can define the parameter grouping by returning the index as integer.
 	 * In case no grouping is required false is to be returned.
@@ -127,6 +117,16 @@ interface IExtension {
 	 */
 	public function isFilterValid($filterValue);
 
+	/**
+	 * The extension can filter the types based on the filter if required.
+	 * In case no filter is to be applied false is to be returned unchanged.
+	 *
+	 * @param array $types
+	 * @param string $filter
+	 * @return array|false
+	 */
+	public function filterNotificationTypes($types, $filter);
+
 	/**
 	 * For a given filter the extension can specify the sql query conditions including parameters for that query.
 	 * In case the extension does not know the filter false is to be returned.
diff --git a/lib/public/activity/imanager.php b/lib/public/activity/imanager.php
index a08670be4b..4a07e6912b 100644
--- a/lib/public/activity/imanager.php
+++ b/lib/public/activity/imanager.php
@@ -75,19 +75,18 @@ interface IManager {
 	 */
 	function getNotificationTypes($languageCode);
 
-	/**
-	 * @param array $types
-	 * @param string $filter
-	 * @return array
-	 */
-	function filterNotificationTypes($types, $filter);
-
 	/**
 	 * @param string $method
 	 * @return array
 	 */
 	function getDefaultTypes($method);
 
+	/**
+	 * @param string $type
+	 * @return string
+	 */
+	function getTypeIcon($type);
+
 	/**
 	 * @param string $app
 	 * @param string $text
@@ -106,12 +105,6 @@ interface IManager {
 	 */
 	function getSpecialParameterList($app, $text);
 
-	/**
-	 * @param string $type
-	 * @return string
-	 */
-	function getTypeIcon($type);
-
 	/**
 	 * @param array $activity
 	 * @return integer|false
@@ -129,6 +122,13 @@ interface IManager {
 	 */
 	function isFilterValid($filterValue);
 
+	/**
+	 * @param array $types
+	 * @param string $filter
+	 * @return array
+	 */
+	function filterNotificationTypes($types, $filter);
+
 	/**
 	 * @param string $filter
 	 * @return array