Add docsting for pass plugin

qml/pages/PasswordList.qml

@@ -1,11 +1,11 @@
-import "headers"
 import "../components"
 import "../dialogs"
 import Lomiri.Components 1.3
+import Lomiri.Components.Popups 1.3
 import Pass 1.0
 import Qt.labs.folderlistmodel 2.1
 import QtQuick 2.4
-import Lomiri.Components.Popups 1.3
+import "headers"
 
 Page {
     id: passwordListPage
@@ -64,6 +64,15 @@ Page {
 
     }
 
+    Component {
+        id: passwordPageDecryptError
+
+        ErrorDialog {
+            textError: i18n.tr("Decryption failed !")
+        }
+
+    }
+
     header: MainHeader {
         id: passwordListHeader
 
@@ -89,13 +98,4 @@ Page {
         ]
     }
 
-    Component {
-        id: passwordPageDecryptError
-
-        ErrorDialog {
-            textError: i18n.tr("Decryption failed !")
-        }
-
-    }
-
 }

qml/pages/settings/InfoKeys.qml

@@ -11,6 +11,16 @@ Page {
 
     property string currentKey
 
+    Component.onCompleted: {
+        Pass.onGetAllGPGKeysSucceed.connect(function(keys_info) {
+            infoKeysListView.model = keys_info;
+        });
+        Pass.getAllGPGKeysFailed.connect(function(message) {
+            PopupUtils.open(infoKeysPageGetAllError);
+        });
+        Pass.getAllGPGKeys();
+    }
+
     ListView {
         id: infoKeysListView
 
@@ -18,7 +28,6 @@ Page {
         anchors.bottom: parent.bottom
         anchors.right: parent.right
         anchors.left: parent.left
-        model: Pass.getAllGPGKeys()
 
         delegate: Grid {
             columns: 1
@@ -153,6 +162,15 @@ Page {
 
     }
 
+    Component {
+        id: infoKeysPageGetAllError
+
+        ErrorDialog {
+            textError: i18n.tr("Decryption failed !")
+        }
+
+    }
+
     header: StackHeader {
         id: infoKeysHeader