[FIX] web_editor: round px values converted from rem to 1 decimal place

When converting an rem size to a pixel size, we sometimes ended up with
values with many decimal places. This rounds them to one decimal place.

X-original-commit: 8f8d5bf93f60560040a37695c3439600d5d88287
Part-of: odoo/odoo#81540

addons/web_editor/static/src/js/backend/convert_inline.js

@@ -788,7 +788,8 @@ function normalizeRem($editable) {
         const remMatch = node.getAttribute('style').match(/[\d\.]+\s*rem/g);
         for (const rem of remMatch || []) {
             const remValue = parseFloat(rem.replace(/[^\d\.]/g, ''));
-            node.setAttribute('style', node.getAttribute('style').replace(rem, remValue * rootFontSize + 'px'));
+            const pxValue = Math.round(remValue * rootFontSize * 10) / 10;
+            node.setAttribute('style', node.getAttribute('style').replace(rem, pxValue + 'px'));
         }
     }
 }