do not expand tree by defailt if it supports incremental fetching, correct count in header

gui/griffon-app/controllers/com/muwire/gui/BrowseController.groovy

@@ -100,7 +100,6 @@ class BrowseController {
             synchronized (model.allResults) {
                 model.allResults.addAll(results)
             }
-            model.resultCount = model.results.size()
         }
         
         List<UIBrowseDirEvent> dirsCopy
@@ -110,12 +109,15 @@ class BrowseController {
         }
         for (UIBrowseDirEvent event : dirsCopy) {
             model.resultsTreeModel.addToTree(event)
+            model.allDirs.add(event)
         }
             
         if (model.visible && !(resultsCopy.isEmpty() && dirsCopy.isEmpty())) {
             view.refreshResults()
         } 
         
+        model.resultCount = model.results.size() + model.allDirs.size()
+        
         List<BrowseStatusEvent> statusCopy
         synchronized (model.pendingStatuses) {
             statusCopy = new ArrayList<>(model.pendingStatuses)

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

@@ -37,6 +37,7 @@ class BrowseModel {
     
     def results = []
     List<UIResultEvent> allResults = []
+    List<UIBrowseDirEvent> allDirs = []
     
     boolean visible = true
     List<UIResultBatchEvent> pendingResults = Collections.synchronizedList(new ArrayList<>())

gui/griffon-app/views/com/muwire/gui/BrowseView.groovy

@@ -329,11 +329,12 @@ class BrowseView {
         TreePath[] selectedPaths = tree.getSelectionPaths()
         Set<TreePath> expanded = new HashSet<>(treeExpansions.expandedPaths)
         model.resultsTreeModel.nodeStructureChanged(model.root)
-        
-        if (treeExpansions.manualExpansion)
-            expanded.each { tree.expandPath(it) }
-        else
-            TreeUtil.expand(tree)
+        if (model.session == null && !model.session.supportsIncremental()) {
+            if (treeExpansions.manualExpansion)
+                expanded.each { tree.expandPath(it) }
+            else
+                TreeUtil.expand(tree)
+        }
         tree.setSelectionPaths(selectedPaths)
     }