[FIX] web_editor: resolved failed forward-port

Forward-port https://github.com/odoo/odoo/commit/f5e7b866860436782ade53308da1ff725be1f124
failed for commit https://github.com/odoo/odoo/commit/78a556601e6b1e72c6d1ac776e31588dd2ffa28f

addons/web_editor/static/src/js/editor/rte.js

@@ -385,7 +385,15 @@ var RTEWidget = Widget.extend({
         } else {
             rng = $editable.data('range') || rng;
         }
-        rng.select();
+        try {
+            // TODO this line might break for unknown reasons. I suppose that
+            // the created range is an invalid one. As it might be tricky to
+            // adapt that line and that it is not a critical one, temporary fix
+            // is to ignore the errors that this generates.
+            rng.select();
+        } catch (e) {
+            console.log('error', e);
+        }
         history.recordUndo($editable, event, internal_history);
     },
     /**