Bunch of improvement for thumbnails integration:

- add a default thumb size value (125x90px)
  - improve private vertical bar visual, especially with thumbnails
  - translations
  - add a sync thumbs button in tool and empty picwall page
  - fixes WT download mode in JSON config

tpl/default/configure.html

@@ -251,7 +251,7 @@
                 {if="! $gd_enabled"}
                   {'You need to enable the extension <code>php-gd</code> to use thumbnails.'|t}
                 {elseif="$thumbnails_enabled"}
-                  <a href="?do=thumbs_update">{'Synchonize thumbnails'|t}</a>
+                  <a href="?do=thumbs_update">{'Synchronize thumbnails'|t}</a>
                 {/if}
               </span>
             </label>

tpl/default/linklist.html

@@ -132,7 +132,7 @@
         <div class="linklist-item linklist-item{if="$value.class"} {$value.class}{/if}" data-id="{$value.id}">
           <div class="linklist-item-title">
             {if="$thumbnails_enabled && !empty($value.thumbnail)"}
-              <div class="linklist-item-thumbnail">
+              <div class="linklist-item-thumbnail" style="width:{$thumbnails_width}px;height:{$thumbnails_height}px;">
                 <div class="thumbnail">
                   <a href="{$value.real_url}">
                   {ignore}RainTPL hack: put the 2 src on two different line to avoid path replace bug{/ignore}

tpl/default/picwall.html

@@ -12,6 +12,14 @@
   </div>
 </div>
 {else}
+  {if="count($linksToDisplay)===0 && $is_logged_in"}
+    <div class="pure-g pure-alert pure-alert-warning page-single-alert">
+      <div class="pure-u-1 center">
+        {'There is no cached thumbnail. Try to <a href="?do=thumbs_update">synchronize them</a>.'|t}
+      </div>
+    </div>
+  {/if}
+
   <div class="pure-g">
     <div class="pure-u-lg-1-6 pure-u-1-24"></div>
     <div class="pure-u-lg-2-3 pure-u-22-24 page-form page-visitor">

tpl/default/tools.html

@@ -45,6 +45,14 @@
       </a>
     </div>
 
+    {if="$thumbnails_enabled"}
+      <div class="tools-item">
+        <a href="?do=thumbs_update" title="{'Synchronize all link thumbnails'|t}">
+          <span class="pure-button pure-u-lg-2-3 pure-u-3-4">{'Synchronize thumbnails'|t}</span>
+        </a>
+      </div>
+    {/if}
+
     {loop="$tools_plugin"}
       <div class="tools-item">
         {$value}