修复确认框取消按钮某些情况下无背景色的问题

o2web/source/o2_core/o2/widget/$Dialog/default/css.wcss

@@ -58,7 +58,7 @@
         "min-width": "80px",
         "margin": "10px 5px",
         "color": "#fff",
-        "background-color": "#999999 !important",
+        "background-color": "#999999"
 
-    },
+    }
 }

o2web/source/o2_core/o2/widget/$Dialog/o2/css.wcss

@@ -73,7 +73,7 @@
         "min-width": "80px",
         "margin": "10px 5px",
         "color": "#fff",
-        "background-color": "#999999 !important",
+        "background-color": "#999999"
 
-    },
+    }
 }