[erp5_web_renderjs_ui] Disable button background image for Firefox

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_css.css

@@ -331,6 +331,7 @@ select {
   line-height: 1.4em;
   cursor: pointer;
   border: none;
+  background-image: none;
   background-color: #FFFFFF;
   color: #1F1F1F;
   border-radius: 0.325em;
@@ -369,6 +370,7 @@ button {
   margin: 0;
   padding: 0;
   border: none;
+  background-image: none;
   background-color: #FFFFFF;
   color: #1F1F1F;
   transition: background-color 0.2s ease-out;

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_css.xml

@@ -236,7 +236,7 @@
             </item>
             <item>
                 <key> <string>serial</string> </key>
-                <value> <string>952.44617.5284.46489</string> </value>
+                <value> <string>952.46193.43042.64221</string> </value>
             </item>
             <item>
                 <key> <string>state</string> </key>
@@ -254,7 +254,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1469115939.36</float>
+                        <float>1469116036.02</float>
                         <string>UTC</string>
                       </tuple>
                     </state>

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/erp5css.less.txt

@@ -369,6 +369,7 @@ select {
 
 
    border: none;
+   background-image: none;
    background-color: @colortextboxbackground;
    color: @colortextboxforeground;
    border-radius: @radius;
@@ -416,6 +417,7 @@ input[type=submit], button {
   margin: 0;
   padding: 0;
   border: none;
+  background-image: none;
   background-color: @colorbackground;
   color: @colorforeground;