run LaterInvocator events in small batches

to decrease the number of Swing events produced
to eliminate "too many events" from LaterInvocator redispatches
to make TransferToEDTQueue not so necessary

platform/platform-impl/src/com/intellij/openapi/application/impl/LaterInvocator.java

@@ -394,8 +394,15 @@ public class LaterInvocator {
     @Override
     public void run() {
       FLUSHER_SCHEDULED.set(false);
-      if (runNextEvent()) {
-        requestFlush();
+      long startTime = System.currentTimeMillis();
+      while (true) {
+        if (!runNextEvent()) {
+          return;
+        }
+        if (System.currentTimeMillis() - startTime > 5) {
+          requestFlush();
+          return;
+        }
       }
     }