Flow & Stages: Search/Filter should search in all table columns

[BobSilent]

Currently the Search box in Flows/Stages/Prompts only searches/filters for values in (by intention?) some columns

It would be helpful to filter for values in column "Prompts:Stages"/"Stages:Flows" as well, as this would allow to list e.g. all Prompts of a dedicated Stage and reorder them much easier.

[BeryJu]

This will be partially fixed by #7698