DBManager -> Browser synchronization

Reload/refresh the browser tree and source select connection
items when connections, tables etc. change in the DBManager

Note that this is uni-directional: changes in the browser tree
are not (yet) propagated to the DBManager

python/plugins/db_manager/db_manager.py

@@ -57,6 +57,7 @@ def __init__(self, iface, parent=None):
 
         self.tabs.currentChanged.connect(self.tabChanged)
         self.tree.selectedItemChanged.connect(self.itemChanged)
+        self.tree.model().dataChanged.connect(self.iface.reloadConnections)
         self.itemChanged(None)
 
     def closeEvent(self, e):