title: Intellij Flutter adding prefix to imports
body: <p>I have installed the latest version of IntelliJ with the latest version of the flutter plugin. But when I trigger the code completion (Command + Space) for something like <code>List</code>, I see this being added to the imports </p>
  
  <p><code>import 'dart:core' as prefix0;</code></p>
  
  <p>and my <code>List</code> becomes </p>
  
  <p><code>prefix0.List</code></p>
  
  <p>Anything I can do to avoid this annoying bug?</p>
  
  <hr>
  
  <p><strong>Flutter doctor:</strong></p>
  
  <pre><code>[✓] Flutter (Channel stable, v1.2.1, on Mac OS X 10.14.4 18E226, locale en-US)
      • Flutter version 1.2.1 at /Users/sravindran/dev/flutter
      • Framework revision 8661d8aecd (3 months ago), 2019-02-14 19:19:53 -0800
      • Engine revision 3757390fa4
      • Dart version 2.1.2 (build 2.1.2-dev.0.0 0a7dcf17eb)
  
  [✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
      • Android SDK at /Users/sravindran/Library/Android/sdk
      • Android NDK location not configured (optional; useful for native profiling support)
      • Platform android-28, build-tools 28.0.3
      • ANDROID_HOME = /Users/sravindran/Library/Android/sdk
      • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)
      • All Android licenses accepted.
  
  [✓] iOS toolchain - develop for iOS devices (Xcode 10.2.1)
      • Xcode at /Applications/Xcode.app/Contents/Developer
      • Xcode 10.2.1, Build version 10E1001
      • ios-deploy 1.9.4
      • CocoaPods version 1.6.1
  
  [✓] Android Studio (version 3.3)
      • Android Studio at /Applications/Android Studio.app/Contents
      • Flutter plugin version 33.3.1
      • Dart plugin version 182.5215
      • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)
  
  [✓] IntelliJ IDEA Community Edition (version 2019.1.2)
      • IntelliJ at /Applications/IntelliJ IDEA CE.app
      • Flutter plugin version 35.3.3
      • Dart plugin version 191.7141.49
  
  [✓] VS Code (version 1.30.1)
      • VS Code at /Applications/Visual Studio Code.app/Contents
      • Flutter extension version 2.25.1
  
  [!] Connected device
      ! No devices available
  
  ! Doctor found issues in 1 category.
  Process finished with exit code 0
  </code></pre>