title: Implicit dependency specified in target platform not resolved on launch
body: <p>As part of a transition of a stand-alone application to the Eclipse RCP framework, 
  I included a plugin (<code>plugin-core</code>) as part of the target platform and added it to the list of implicit dependencies in the target platform. </p>
  
  <p>I then proceeded to create a UI feature wrapping a single UI plugin (for now) and defined a dependency to <code>plugin-core</code> in the UI plugin. I then included this feature in a product (the only feature in this product for now) and attempted to run the application.</p>
  
  <p>However, I received an unresolved dependency error for the <code>plugin-core</code>. I thought that plugins that were included in the target platform and for which the implicit dependency was defined would be resolved without having to explicitly include them in a feature. </p>
  
  <p>I was only able to resolve this problem by explicitly including <code>plugin-core</code> in my UI feature as well. </p>
  
  <p>Can someone help me understand what I'm doing wrong? </p>
  
  <p>Thanks!</p>