title: Stop PyCharm from "Scanning installed packages..." on every program start for already scanned projects
body: <h2>Default PyCharm behavior</h2>
  <p><strong>Every time</strong> when</p>
  <ul>
  <li>I start PyCharm IDE application</li>
  <li>or re-open (restart) the PyCharm IDE application</li>
  <li>or re-open my existing project,</li>
  </ul>
  <p>...PyCharm starts &quot;Updating python interpreter&quot; and &quot;Scanning installed packages...&quot;.</p>
  <h2>Problems</h2>
  <ol>
  <li>The project is located on my hard drive and was already 100% scanned. Nothing new to scan again.</li>
  <li>The project or project requirements did not change. Nothing to scan again.</li>
  <li>I would be happy to allow this background scans, but:
  <ul>
  <li>they are very slow (~5-10 minutes);</li>
  <li>they are just totally useless because nothing changes between restarts.</li>
  </ul>
  </li>
  </ol>
  <h2>What I want</h2>
  <p>Stop PyCharm from this useless resource-wasting slow unnecessary scans of already scanned projects.</p>