[FIX] web_widget_numeric_step: always display on touch screens; avoid layout jumping otherwise

Before this patch:
- On a tablet, buttons wouldn't display (big screen; can't hover).
- On a PC, fields would make layout jumps while hovering.

@moduon MT-4472

web_widget_numeric_step/__manifest__.py

@@ -12,10 +12,10 @@
     "depends": ["web"],
     "assets": {
         "web.assets_backend": [
-            "web_widget_numeric_step/static/src/xml/numeric_step.xml",
-            "web_widget_numeric_step/static/src/js/numeric_step.esm.js",
+            "web_widget_numeric_step/static/src/*",
         ],
     },
+    "maintainers": ["rafaelbn", "yajo"],
     "auto_install": False,
     "installable": True,
 }