enable set custom index background image

web/src/assets/css/admin/form.styl

@@ -3,14 +3,12 @@
     display flex
     width 100%
 
-    .el-input {
-      width 50%
+    .el-input,.el-select,.el-switch {
+      margin-right 10px
     }
 
     .info {
-      margin-left 6px
       margin-top 2px
     }
-
   }
 }