Fix several doc issues (#5215)

library/Icinga/Web/Controller.php

@@ -67,6 +67,8 @@ class Controller extends ModuleActionController
      * @param   string  $message    Exception message or exception format string
      * @param   mixed   ...$arg     Format string argument
      *
+     * @return never
+     *
      * @throws  HttpBadRequestException
      */
     public function httpBadRequest($message)
@@ -80,6 +82,8 @@ class Controller extends ModuleActionController
      * @param   string  $message    Exception message or exception format string
      * @param   mixed   ...$arg     Format string argument
      *
+     * @return never
+     *
      * @throws  HttpNotFoundException
      */
     public function httpNotFound($message)

library/Icinga/Web/Widget/Tab.php

@@ -31,7 +31,7 @@ class Tab extends AbstractWidget
     /**
      * Default values for widget properties
      *
-     * @var array
+     * @var ?string
      */
     private $name = null;
 
@@ -122,7 +122,7 @@ class Tab extends AbstractWidget
     }
 
     /**
-     * @param mixed $name
+     * @param string $name
      */
     public function setName($name)
     {
@@ -130,7 +130,7 @@ class Tab extends AbstractWidget
     }
 
     /**
-     * @return mixed
+     * @return ?string
      */
     public function getName()
     {
@@ -162,7 +162,7 @@ class Tab extends AbstractWidget
     }
 
     /**
-     * @param mixed $title
+     * @param string $title
      */
     public function setTitle($title)
     {

library/Icinga/Web/Widget/Tabs.php

@@ -75,7 +75,7 @@ EOT;
     /**
      * This is where single tabs added to this container will be stored
      *
-     * @var array
+     * @var array<string, Tab>
      */
     private $tabs = array();
 
@@ -419,7 +419,7 @@ EOT;
     /**
      * Return all tabs contained in this tab panel
      *
-     * @return array
+     * @return array<string, Tab>
      */
     public function getTabs()
     {