title: Where are the CSS files stored in smartgwt?
body: <p>I started messing with SmartGWT the other day, but ive stumbled in this ridiculous spot..
  This is a question that the documentation should respond, but i havent found any simple and straightforward solution.
  What i want:
  add 5px to the left margin of a Hlayout.
  I tried the method setMargin(), but it applies margins to the 4 margins. Since i just want the left one, i was left with the option to use the this.setStyleName(), which leads me to the problem.</p>
  
  <p>How should i go about it? is there a master css file that i have to edit? should i create a custom css file and put there my customizations? where should it be saved?</p>
  
  <p>I tried the solution given <a href="https://stackoverflow.com/questions/6091496/question-about-css-files-for-smartgwt-project/">here</a>, but it doesnt seem to work for me. am using smartgwt v.2.5</p>