[Task] Target selection should allow filtering

[tthvo]

Right now, the target select menu will just show a plain list and will expand as needed. I think we should limit its size and allow filters. Or perhaps a new design for this.

Related to #429

[tthvo]

Hey @andrewazores, just have a thought about this when looking through the OpenShift console.

Do you think we could have a separate side-card tab for target view (Topology) as here but with some tweaks? Other pages can just use context selector similar to how we select namespace in OpenShift?

This way we can have some initial setup for multi-namespace support as we discussed. Also, filters can be supported here too. I guess this would mean all operations on target list (i.e. add, delete, edit) must be done only on this new side-car tab.

[andrewazores]

Sure, I like that idea. It's a good upgrade from where our UX is now at least. I think the question of how to display things when the user wants to select multiple targets, or a higher order node from the tree, is still open ("start a recording on every target below this Deployment"), but at least this way we get a way to visualize those higher order nodes and see some of the relationships between targets.