Fixed switching the --beta

[MusclePr]

Fixed a bug where the update would not occur even if preaquatica and public were specified alternately with the --beta option.

[MusclePr]

TEST PATTERN

Before:

1. arkmanager install --beta=preaquatica ... preaquatica
2. arkmanager update ... preaquatica
3. arkmanager update --beta=public ... preaquatica
4. arkmanager update --beta=preaquatica ... preaquatica

After:

1. arkmanager install --beta=preaquatica ... preaquatica
2. arkmanager update ... public
3. arkmanager update --beta=public ... public
4. arkmanager update --beta=preaquatica ... preaquatica

[klightspeed]

If --beta is not being properly passed through to change the current beta, then we need to investigate where it is not passing through. I'm not sure switching back to the public branch is the desired action when no --beta option is provided.

I am not currently at my computer at the moment, and cannot currently have a proper look at this.

[MusclePr]

Yes, I was worried about that too.

Initially I implemented it like this:

  if [ -n "$appbeta" ]; then
    appbranch="${appbeta}"
  fi

[MusclePr]

Maybe I'm misunderstanding something fundamental.

Should I use "arkmanager install" instead of "arkmanager update" to switch to the Beta Channel?

[klightspeed]

Could you please check if #1292 works as desired when using `arkmanager update --beta=xxx?

[MusclePr]

This PR is being closed to be taken over by the owner's PR.