Revert "Update parameter <select> elements to render 'invalid' classes. Add '.invalid' CSS for <select> elements. Rework validateParam() function. Added .btn-sm class for "Add item" and "Remove item" buttons in array parameters. Reduce border-width on <select> elements inside parameters. Update tests for utils.validateParam()."

This reverts commit 666e22f989.

src/style/_form.scss

@@ -21,10 +21,6 @@ select
 
         background: #f7f7f7;
     }
-
-    &.invalid {
-        @include invalidFormElement();
-    }
 }
 
 .opblock-body select
@@ -57,8 +53,12 @@ input[type=file]
     border-radius: 4px;
     background: #fff;
 
-    &.invalid {
-        @include invalidFormElement();
+    &.invalid
+    {
+        animation: shake .4s 1;
+
+        border-color: $_color-delete;
+        background: lighten($_color-delete, 35%);
     }
 }