[vcs-log] refresh action does soft refresh

platform/vcs-log/impl/src/com/intellij/vcs/log/data/VcsLogData.java

@@ -256,6 +256,14 @@ public class VcsLogData implements Disposable, VcsLogDataProvider {
     initialize();
   }
 
+  /**
+   * Refreshes all the roots.
+   * In contrast to refreshCompletely, does not re-read all log but rather the most recent commits.
+   */
+  public void refreshSoftly() {
+    myRefresher.refresh(myLogProviders.keySet());
+  }
+
   /**
    * Makes the log perform refresh for the given root.
    * This refresh can be optimized, i. e. it can query VCS just for the part of the log.

platform/vcs-log/impl/src/com/intellij/vcs/log/ui/actions/RefreshLogAction.java

@@ -54,7 +54,7 @@ public class RefreshLogAction extends RefreshAction {
       }
     }
 
-    logManager.getDataManager().refreshCompletely();
+    logManager.getDataManager().refreshSoftly();
   }
 
   @Override