romain_dev: thread force white background

bt5/romain_dev/PathTemplateItem/web_page_module/romain_thread_reader_css.css

 div[data-gadget-url$="gadget_thread_reader.html"] {
   max-width: 50em;
 }
+div[data-gadget-url$="gadget_thread_reader.html"] > ol {
+  background-color: #FFFFFF;
+}
 div[data-gadget-url$="gadget_thread_reader.html"] > ol > li {
   padding-bottom: 12pt;
   /*

bt5/romain_dev/PathTemplateItem/web_page_module/romain_thread_reader_css.xml

@@ -240,7 +240,7 @@
                   </item>
                   <item>
                       <key> <string>serial</string> </key>
-                      <value> <string>989.23184.30015.20821</string> </value>
+                      <value> <string>989.27539.21046.4334</string> </value>
                   </item>
                   <item>
                       <key> <string>state</string> </key>
@@ -258,7 +258,7 @@
                           </tuple>
                           <state>
                             <tuple>
-                              <float>1610719802.53</float>
+                              <float>1611234608.51</float>
                               <string>UTC</string>
                             </tuple>
                           </state>

bt5/romain_dev/SkinTemplateItem/portal_skins/romain_dev/gadget_thread_reader.less.txt

@@ -52,6 +52,7 @@ div[data-gadget-url$="gadget_thread_reader.html"] {
   max-width: 50em;
 
   & > ol {
+    background-color: @colorbackground;
 
     & > li {
       padding-bottom: @double-margin-size;