frontend: ClusterNotFoundPopup: Fix to work with multi clusters

[illume]

Now when there's a wrong cluster name in the URL when using multiple clusters it also gives a cluster not found alert message for each cluster not found.

NOTE: A maximum of only two alerts will be shown.

How to test

• Add two clusters with + between then in the URL, one should be wrong, then see cluster not found message

[joaquimrocha]

Does this show a popup per cluster? I think this UX could be unnerving for the user. I had actually disabled the popup when in multi-cluster.
c42f7b2

Can't remember exactly but I think I had tried to add the cluster problems in the main view, to be expanded at will.

[illume]

I don't think completely disabling the alert is a good idea.

It's most likely every single cluster won't break at the same time.

How about:

• There is already a note in the main view cluster list about the clusters being down.
• I limit the amount of popups for max 2 clusters?

[illume]

@joaquimrocha please respond to this comment? #2512 (comment)

[joaquimrocha]

I don't think completely disabling the alert is a good idea.

It's most likely every single cluster won't break at the same time.

How about:

• There is already a note in the main view cluster list about the clusters being down.
• I limit the amount of popups for max 2 clusters?

Okay. Let's try this. If it gets unnerving, we can act on that.

[joaquimrocha]

Solved a conflict it had.

[illume]

I don't think completely disabling the alert is a good idea.
It's most likely every single cluster won't break at the same time.
How about:

• There is already a note in the main view cluster list about the clusters being down.
• I limit the amount of popups for max 2 clusters?

Okay. Let's try this. If it gets unnerving, we can act on that.

I made it so only a maximum of only two alerts will be shown.

[illume]

rebased against main

[knrt10]

Tested. Lgtm. Thanks

change to limit maximum number of alerts was done