"Back" button and/or query history for korrel8r panel.

[alanconway]

If someone mistypes a query or gets to an uninteresting correlation graph, they will want a way to return return to previous interesting queries. A drop down history of queries could be useful for advanced users, but many users will be unaware of the query syntax so for them a "back" button might be better.

[PeterYurkovich]

Some things to consider for a history:

• How long does the history stay around for? Just the time the panel is open or do we want to persist them in browser storage?
• What happens if someone presses back one too many times? Do we need a forward button as well? Or does that complicate the UI too much?
• Maybe a korrel8r query dropdown wouldn't work well, but what if we could find a way to humanize the queries so that people could understand them, pulling out key information like the namespace and name? Or is that impossible since the queries can be close to limitless in their specificity and varies across the domains

[alanconway]

Queries are in the language of their domain (LogQL, PromQL, k8s REST etc.) There is no "universal" korre8lr query language, the philosophy is to tackle the reality of diverse systems and query languages, rather than waiting for an ideal uniform world (that's a job for projects like OTEL, GraphQL and the like) Details of query probably only useful to an advanced user, a basic user will be using queries generated automatically by the console, and may never even look at the query (e.g. see console logging page which hides the LogQL query unless requested) Basic user just wants to "get back to where I was before". There may be something we can do to humanize the queries, by relating them to console resources using icons or summarizing them somehow - I haven't thought it through.

[alanconway]

Possible resolution - some of the query and search widgets automatically maintain a history of past values, that might be all we need.