less forced project rescans

java/compiler/impl/src/com/intellij/compiler/server/BuildManager.java

@@ -335,7 +335,7 @@ public class BuildManager implements ApplicationComponent{
     return VirtualFileManager.extractPath(url);
   }
 
-  private void scheduleAutoMake() {
+  public void scheduleAutoMake() {
     if (IS_UNIT_TEST_MODE || PowerSaveMode.isEnabled()) {
       return;
     }

java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/ProjectStructureConfigurable.java

@@ -290,7 +290,7 @@ public class ProjectStructureConfigurable extends BaseConfigurable implements Se
     myContext.getDaemonAnalyzer().clearCaches();
     SwingUtilities.invokeLater(new Runnable() {
       public void run() {
-        BuildManager.getInstance().clearState(myProject);
+        BuildManager.getInstance().scheduleAutoMake();
       }
     });
   }