Option to list and stop the serve/streaming

[nakamume]

Pre-Submission checklist

• There is no existing issue that already asks for this feature.
  
• The feature already exists in rclone (on your PC or in Termux)
• I am prepared to help make this feature

What version of Round Sync are you using (About -> App version)?

v2.5.6

What problem are you trying to solve?

I can serve the files/directories (thanks for supporting this feature). But there doesn't seem to be any option to check what's currently being served and most importantly to stop the serve. Currently the only way that works to stop a serve is to kill the app.

What should Round Sync be able to do differently to help with this problem?

Could we have an option to list the current serves and to stop them.

[newhinton]

There should always be a notification that tells you that we are serving something*. It also has a cancel button you can use to stop it. Maybe you diabled notifications?

• though, it does not show what we are serving.