Added new option for GxsForums and FeedReader - Open all forums/feeds in new tab.

Option=on (standard)
- no standard tab
- new tab by single click
- no menu entry "Open in new tab"

Option=off:
- standard tab (not closeable)
- open in standard tab by single click
- menu entry "Open in new tab"
- open new tab with middle mouse button


git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@6060 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/common/GroupTreeWidget.cpp

@@ -434,6 +434,11 @@ QTreeWidgetItem *GroupTreeWidget::activateId(const QString &id, bool focus)
 	return item;
 }
 
+RSTreeWidget *GroupTreeWidget::treeWidget()
+{
+	return ui->treeWidget;
+}
+
 int GroupTreeWidget::subscribeFlags(const QString &id)
 {
 	QTreeWidgetItem *item = getItemFromId(id);