[OpenID] Added synchronization button and corresponding action

UI:
- "Delete" area is now "Actions" area
- Updated themes to better reflect the changes

Routes:
- index.php?action=finishsyncopenid => finishsyncopenid

Translations:
- Updated OpenID translation files
- Updated OpenID POT file

Versioning:
- Bump OpenID minor version
- Bump GS patch version

Why would have labeling the Synchronize button of Sync been of bad taste? - answered by XRevan86:

In "synchronise" "ch" is a digraph meaning /k/ (actually /x/ turned into /k/ in English but whatever).
So… not separate letters.
It's like "ph" in "alphabet", or "sh" in "sheep", or "ch" in "chop" -- "ch" can mean a whole variety of sounds.

plugins/OpenID/OpenIDPlugin.php

@@ -50,7 +50,7 @@ if (!defined('STATUSNET')) {
  */
 class OpenIDPlugin extends Plugin
 {
-    const PLUGIN_VERSION = '2.0.0';
+    const PLUGIN_VERSION = '2.1.0';
 
     // Plugin parameter: set true to disallow non-OpenID logins
     // If set, overrides the setting in database or $config['site']['openidonly']
@@ -83,6 +83,8 @@ class OpenIDPlugin extends Plugin
                     array('action' => 'finishopenidlogin'));
         $m->connect('index.php?action=finishaddopenid',
                     array('action' => 'finishaddopenid'));
+        $m->connect('index.php?action=finishsyncopenid',
+                    array('action' => 'finishsyncopenid'));
         $m->connect('main/openidserver', array('action' => 'openidserver'));
         $m->connect('panel/openid', array('action' => 'openidadminpanel'));