[FIX] web: amount on bank.statement not displayed in mobile

Before this commit, it was not possible to add an amount to a new
bank statement. The input (.o_form_field_monetary) appeared as disabled.

This bug was due to this commit: @a1224f5ca
This rule should be only applied to .o_form_field_radio.

Closes #18887
Task ID: 35832

addons/web/static/src/less/form_view_layout.less

@@ -168,9 +168,7 @@
 
     // Flex fields
     .o_form_field_many2one, .o_form_field_radio, .o_form_field_many2manytags, .o_form_field_percent_pie, .o_form_field_monetary, .o_form_field_binary_file {
-    @media (min-width: @screen-sm-min) {
         .o-inline-flex-display();
-    }
         > span, > button {
             .o-flex(0, 0, auto);
         }
@@ -206,6 +204,9 @@
 
     // Radio buttons
     .o_form_field_radio {
+        @media (max-width: @screen-xs-max) {
+            display: inline-block;
+        }
         .o_radio_item {
             .o-flex(0, 0, auto);
             .o-flex-display();