Update _bootstrap-variables.scss

src/scss/_bootstrap-variables.scss

@@ -384,7 +384,7 @@ $enable-cssgrid:              false !default;
 $enable-button-pointers:      true !default;
 $enable-rfs:                  true !default;
 $enable-validation-icons:     true !default;
-$enable-negative-margins:     true !default;
+$enable-negative-margins:     true !default; // adminlte-modified
 $enable-deprecation-messages: true !default;
 $enable-important-utilities:  true !default;