Login begin with user's selection when autologin

[yencli]

With autologin on, the login procedure begins always from the first on the list whether the user has selected another cluster to start with. This prevents user from sucessfuly login if one only has access of clusters which is not on the top of the list due to the modification for #128. However, certains users will have to redo the login procedure when trying to reach another cluster for the first time if none of their granted clusters are on the top of the list. Further discussion for a more intergrated plan will be needed.

[rezib]

This pull request concerns Slurm-web v2 which is not maintained anymore. You are highly encouraged to test the new version v3.0.0 that is officially maintained. The quick start guide for v3.0.0 is available online: https://docs.rackslab.io/slurm-web/install/quickstart.html

Unless someone is motivated to maintain the old version of Slurm-web or you have a justified reason to keep this pull request open, it will be closed in a few weeks.

[rezib]

For the reasons explained in the previous comment, I finally close this PR.