Go to web app button should forwards current server ip address as a parameter

[TRtomasz]

Description
If you start service and something is already using default port 11470 it will start using 11471, then when you click "open web app" from tray it will open it but web app without additional parameter will not try to use service server.

[elpiel]

This has been implemented in #44 using the "EngineFS server started at" like when starting the server, however, we should first implement this feature in stremio-web to have an effect:

Stremio/stremio-web#420

• However, I'm not sure if we should use the base_url from the server settings OR the EngineFS server started at .... line in the server stdout. - Yes, we should use the (localhost, i.e. 127.0.0.1) url provided in the log.