add proper permission editing for folders

src/main/java/com/owncloud/android/files/FileMenuFilter.java

@@ -260,7 +260,7 @@ public class FileMenuFilter {
         }
 
         // SEE DETAILS
-        if (!isSingleFile()) {
+        if (!isSingleSelection()) {
             toHide.add(R.id.action_see_details);
         } else {
             toShow.add(R.id.action_see_details);

src/main/java/com/owncloud/android/ui/adapter/UserListAdapter.java

@@ -179,13 +179,8 @@ public class UserListAdapter extends ArrayAdapter {
         if (file.isFolder() && areEditOptionsAvailable) {
             /// TODO change areEditOptionsAvailable in order to delete !isFederated
             editCreateItem.setChecked((sharePermissions & OCShare.CREATE_PERMISSION_FLAG) > 0);
-            editCreateItem.setVisible(canEdit);
-
             editChangeItem.setChecked((sharePermissions & OCShare.UPDATE_PERMISSION_FLAG) > 0);
-            editChangeItem.setVisible(canEdit);
-
             editDeleteItem.setChecked((sharePermissions & OCShare.DELETE_PERMISSION_FLAG) > 0);
-            editDeleteItem.setVisible(canEdit);
         } else {
             editCreateItem.setVisible(false);
             editChangeItem.setVisible(false);