Fix css in tree view for pos backend partner.

The column is set to take the minimum of space.
The button instead of the cell is now set to display:none

pos_backend_partner/__manifest__.py

@@ -6,7 +6,7 @@
 {
     "name": "POS Backend Customer",
     "summary": "Choose point of sale customers in backend",
-    "version": "10.0.1.0.1",
+    "version": "10.0.1.0.2",
     "category": "Point of sale",
     "website": "http://www.akretion.com",
     'author': "Akretion,Odoo Community Association (OCA)",

pos_backend_partner/static/src/css/pos_backend_partner.css

@@ -1,7 +1,11 @@
-td[data-field="select_in_pos_current_order"] {
+th[data-id="select_in_pos_current_order"] {
+  width: 0;
+  margin: 0;
+}
+td[data-field="select_in_pos_current_order"] > button {
   display:none;
 }
 
-.pos_backend_communication td[data-field="select_in_pos_current_order"] {
+.pos_backend_communication td[data-field="select_in_pos_current_order"] > button {
   display:block;
 }