hook up download retry logic

core/src/main/groovy/com/muwire/core/download/Downloader.groovy

@@ -119,6 +119,7 @@ public class Downloader {
     }
     
     public void resume() {
+        currentState = DownloadState.CONNECTING
         downloadManager.resume(this)
     }
 }

gui/griffon-app/models/com/muwire/gui/MainFrameModel.groovy

@@ -59,6 +59,8 @@ class MainFrameModel {
 
     volatile Core core    
 
+    private long lastRetryTime = System.currentTimeMillis()
+        
     void updateTablePreservingSelection(String tableName) {
         def downloadTable = builder.getVariable(tableName)
         int selectedRow = downloadTable.getSelectedRow()
@@ -96,18 +98,24 @@ class MainFrameModel {
             core.eventBus.register(TrustEvent.class, this)
             core.eventBus.register(QueryEvent.class, this)
             
+            timer.schedule({
                 int retryInterval = application.context.get("muwire-settings").downloadRetryInterval
                 if (retryInterval > 0) {
                     retryInterval *= 60000
-                timer.schedule({
+                    long now = System.currentTimeMillis()
+                    if (now - lastRetryTime > retryInterval) {
+                        lastRetryTime = now
                         runInsideUIAsync {
                             downloads.each {
                                 if (it.downloader.currentState == Downloader.DownloadState.FAILED)
                                     it.downloader.resume()
+                                updateTablePreservingSelection("downloads-table")
                             }
                         }
-                }, retryInterval, retryInterval)
+
                     }
+                }
+            }, 60000, 60000)
             
             runInsideUIAsync {
                 trusted.addAll(core.trustService.good.values())