jqwidgets-scripts-custom/demos/Angular/toolbar/fluidsize/src/app/app.component.css

jQWidgets is an advanced jQuery, Angular 7, Vue, React, ASP .NET MVC, Custom Elements and HTML5 UI framework.

.buttonIcon {
  margin: -5px 0 0 -3px;
  width: 16px;
  height: 17px;
}