title: Eclipse e4 part toolbar only shows when Part is in Part Stack?
body: <p>so I would want to add a toolbar to my part, but the toolbar only appears if the part is in a Part Stack. 
  If it is the case, the part toolbar is shown but also the minimize maximize controls and the Part Stack heder thing, which is normal, but has this special eclipse- or RCP look which I would want to avoid.</p>
  
  <p>Does anyone know how to add a toolbar via the application model or otherwise, with just the toolbaritems showing and nothing else ?</p>
  
  <p>Lars Vogel <a href="http://www.vogella.com/tutorials/EclipseRCP/article.html#toolbar_advanced_buttons" rel="nofollow noreferrer">shows how</a> to add a toolbar item, but he doesn't mention that it will only work for Parts in Part Stacks ...
  <img src="https://i.stack.imgur.com/8WBbv.png" alt="screenshot from vogella"></p>
  
  <p>btw: I using eclipse Luna with e4 tools 0.15</p>