remove duplicate completion suggestions

pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart

Index: pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart b/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
index 15f26b2ffa1b8b8a0f3ddb6ab994f03f6dd9a733..705b25b68b65e6da606672a655eb65aa61ab7fc6 100644
--- a/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
+++ b/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
@@ -78,11 +78,13 @@ class DartCompletionManager extends CompletionManager {
       : super(context, source) {
     if (computers == null) {
       computers = [
-        new KeywordComputer(),
+        // LocalComputer before ImportedComputer
+        // because local suggestions take precedence
         new LocalComputer(),
+        new ImportedComputer(),
+        new KeywordComputer(),
         new ArgListComputer(),
         new CombinatorComputer(),
-        new ImportedComputer(),
         new InvocationComputer()
       ];
     }