item: remove unexpected limit of 13 characters for references

bt5/erp5_item/SkinTemplateItem/portal_skins/erp5_item_trade/Base_viewTradeFieldLibrary/my_dialog_mode_listbox_reference.xml

@@ -10,7 +10,6 @@
             <key> <string>delegated_list</string> </key>
             <value>
               <list>
-                <string>display_maxwidth</string>
                 <string>display_width</string>
                 <string>title</string>
               </list>
@@ -54,10 +53,6 @@
             <key> <string>tales</string> </key>
             <value>
               <dictionary>
-                <item>
-                    <key> <string>display_maxwidth</string> </key>
-                    <value> <string></string> </value>
-                </item>
                 <item>
                     <key> <string>display_width</string> </key>
                     <value> <string></string> </value>
@@ -85,10 +80,6 @@
             <key> <string>values</string> </key>
             <value>
               <dictionary>
-                <item>
-                    <key> <string>display_maxwidth</string> </key>
-                    <value> <int>13</int> </value>
-                </item>
                 <item>
                     <key> <string>display_width</string> </key>
                     <value> <int>20</int> </value>