[FIX] web: less boolean_toogle

Before this commit, the boolean_toggle widget was rendered
but the less contained errors that prevented it from displaying correctly
This was due to commit 9dead7e3d3

After this commit, the widget displays correctly

There might be an issue in the future because of
field_utils.formatBoolean, when this function decides to pass the full options dict

OPW 80782

addons/web/static/src/less/webclient.less

@@ -86,39 +86,37 @@ div.o_boolean_toggle {
     width: 32px !important;
     height: 18px;
 
-    & > label {
-        & > input {
+    > input {
             display: none;
         }
 
-        & > .slider {
+    .slider {
+        position: absolute;
+        cursor: pointer;
+        top: 0;
+        left: 0;
+        right: 0;
+        bottom: 0;
+        background-color: #a0a0a0;
+        border-radius: 24px;
+
+        &:before {
             position: absolute;
-            cursor: pointer;
-            top: 0;
-            left: 0;
-            right: 0;
-            bottom: 0;
-            background-color: #a0a0a0;
-            border-radius: 24px;
-
-            &:before {
-                position: absolute;
-                content: "";
-                height: 12px;
-                width: 12px;
-                left: 3px;
-                bottom: 3px;
-                background-color: white;
-                border-radius: 50%;
-            }
+            content: "";
+            height: 12px;
+            width: 12px;
+            left: 3px;
+            bottom: 3px;
+            background-color: white;
+            border-radius: 50%;
         }
+    }
 
-        & > input:checked + .slider {
-            background-color: @odoo-brand-optional;
+    > input:checked + .slider {
+        background-color: @odoo-brand-optional;
 
-            &:before {
-                .translate(14px; 0px);
-            }
+        &:before {
+            .translate(14px; 0px);
         }
     }
 }