ui,popups: fixed exception getting node address when adding a new rule

When a popup was displayed to the user, if they took more than 120s to
respond, the address of the node was lost.

This is because the daemon has hardcoded a max timeout of 120s. If it
fires, the call to AskRule is closed and the context is lost.

In this situation, save the address of the node at the start of AskRule,
so we can reuse it later.

ui/opensnitch/service.py

@@ -751,8 +751,9 @@ def AskRule(self, request, context):
 
         # TODO: allow connections originated from ourselves: os.getpid() == request.pid)
         self._asking = True
-        proto, addr = self._get_peer(context.peer())
-        rule, timeout_triggered = self._prompt_dialog.promptUser(request, self._is_local_request(proto, addr), context.peer())
+        peer = context.peer()
+        proto, addr = self._get_peer(peer)
+        rule, timeout_triggered = self._prompt_dialog.promptUser(request, self._is_local_request(proto, addr), peer)
         self._last_ping = datetime.now()
         self._asking = False
         if rule == None:
@@ -777,14 +778,14 @@ def AskRule(self, request, context):
                 {
                     'action': self.DELETE_RULE,
                     'name': rule.name,
-                    'addr': context.peer()
+                    'addr': peer
                 }
             )
         else:
             self._node_actions_trigger.emit(
                 {
                     'action': self.ADD_RULE,
-                    'peer': context.peer(),
+                    'peer': peer,
                     'rule': rule
                 }
             )