Issue 6795: File Manager selected file actions vanish on navigation t…

…o parent directory

Issue: http://code.google.com/p/cyanogenmod/issues/detail?id=6795

The issue is relate to back navigation (nor to ahead navigation). In this case the history
parcelable info data is recovery (which has a invalid selection data).
On back navigation, replace the selection data parcelable info with the current selection
of the navigation view.
Added notifyDataSetChanged() when toogle visibility, needed to refresh the view and repaint
the items.

Change-Id: Ib281c6fbc33274f6e81cc6b588cde420d6ceb19f

src/com/cyanogenmod/filemanager/activities/NavigationActivity.java

@@ -1218,6 +1218,8 @@ public boolean navigateToHistory(History history) {
                         (NavigationViewInfoParcelable)realHistory.getItem();
                 int viewId = info.getId();
                 NavigationView view = getNavigationView(viewId);
+                // Selected items must not be restored from on history navigation
+                info.setSelectedFiles(view.getSelectedFiles());
                 view.onRestoreState(info);
 
             } else if (realHistory.getItem() instanceof SearchInfoParcelable) {

src/com/cyanogenmod/filemanager/adapters/FileSystemObjectAdapter.java

@@ -457,6 +457,7 @@ private void doSelectDeselectAllVisibleItems(boolean select) {
                             theme.getDrawable(
                                     getContext(), "checkbox_deselected_drawable"); //$NON-NLS-1$
                 }
+                notifyDataSetChanged();
 
                 //Add or remove from the global selected items
                 FileSystemObject fso = getItem(i);