MT#17491 improve speeddials api documentation

Change-Id: Ied1fdc407296e97a14b7823c1c83db461b6aea30

lib/NGCP/Panel/Controller/API/SpeedDials.pm

@@ -25,7 +25,7 @@ class_has 'api_description' => (
     is => 'ro',
     isa => 'Str',
     default => 
-        'Show a collection of speeddials, belonging to a specific subscriber.',
+        'Show a collection of speeddials, belonging to a specific subscriber. The collection\'s id corresponds to the subscriber\'s id.',
 );
 
 class_has 'query_params' => (

lib/NGCP/Panel/Form/Subscriber/SpeedDialAPI.pm

@@ -6,6 +6,10 @@ extends 'HTML::FormHandler';
 
 has_field 'speeddials' => (
     type => 'Repeatable',
+    element_attr => {
+        rel => ['tooltip'],
+        title => ['An array of hashes, each containing the keys "slot" ("*0 .. *9") and "destination" (A valid SIP URI).'],
+    },
 );
 
 has_field 'speeddials.slot' => (