title: package installed but not showing in the pycharm's available packages
body: <p>I installed the PyAutoGUI package using <code>pip install pyautogui</code>.
  I can tell it's installed since I can import it using the PyCharm terminal:</p>
  
  <pre><code>Python 3.6.5 |Anaconda, Inc.| (default, Mar 29 2018, 13:32:41) [MSC v.1900 
  64 bit (AMD64)] on win32
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import pyautogui
  &gt;&gt;&gt; print(pyautogui)
  &lt;module 'pyautogui' from 'C:\\python\\anaconda3\\lib\\site packages\\pyautogui\\__init__.py'&gt;
  &gt;&gt;&gt;
  </code></pre>
  
  <p>My problem is: When I try to add it to my project virtual environment, I can't find it on the available packages. Is there any way to add it manualy ?</p>
  
  <p>P.S.: This is how I'm trying to add it: </p>
  
  <pre><code>File&gt;Settings&gt;Project&gt;Project interpreter&gt;install(the green plus button)&gt;available packages&gt;install
  </code></pre>