erp5_simulation: select first item to have less click

bt5/erp5_simulation/SkinTemplateItem/portal_skins/erp5_simulation/QuantitySplitSolver_viewConfigurationFormBox/my_delivery_solver.xml

@@ -12,6 +12,7 @@
               <list>
                 <string>default</string>
                 <string>external_validator</string>
+                <string>first_item</string>
                 <string>items</string>
                 <string>title</string>
               </list>
@@ -112,6 +113,10 @@
                     <key> <string>field_id</string> </key>
                     <value> <string>my_radio_field</string> </value>
                 </item>
+                <item>
+                    <key> <string>first_item</string> </key>
+                    <value> <int>1</int> </value>
+                </item>
                 <item>
                     <key> <string>form_id</string> </key>
                     <value> <string>Base_viewFieldLibrary</string> </value>

[Jérome Perrin]

In !1221 (merged) there's a "Simple Quantity Split Solver" which solves the "useless click" in another way. With these changes the solvers are not even displayed so users do not have to wonder "what does this mean ?"