Major improvements on policy configuration

- Bugfixes on change_policy
- Replaced _consent modules with configurable modules

modpol_core/modules/send_token.lua

@@ -16,7 +16,7 @@ send_token.data = {
 }
 
 send_token.config = {
-   token_name = ""
+   token_name = nil -- hidden configuration
 }
 
 --- initiate function
@@ -29,7 +29,7 @@ function send_token:initiate(result)
          table.insert(token_list, k)
       end
    end
-   if token_list == {} then
+   if #token_list == 0 then
       modpol.interactions.message(
          self.initiator,
          "No tokens in org")