fix(topology): fix Cola layout failing due to pending outdated graph elements

[tthvo]

Welcome to Cryostat! 👋

Before contributing, make sure you have:

• Read the contributing guidelines
• Linked a relevant issue which this PR resolves
• Linked any other relevant issues, PR's, or documentation, if any
• Resolved all conflicts, if any
• Rebased your branch PR on top of the latest upstream main branch
• Attached at least one of the following labels to the PR: [chore, ci, docs, feat, fix, test]
• Signed all commits using a GPG signature

To recreate commits with GPG signature git fetch upstream && git rebase --force --gpg-sign upstream/main

---

Related to #1303

Description of the change:

Graph Layout was previously failing due to undefined Controller (i.e. via getController func). My speculation is that as new Model (i.e. on discovery tree refresh) is set on the controller, old graph elements are still animating, thus causing the issue. The combination of the following changes seem to fix:

• Debounce (100ms) discovery tree refresh when new target events are emitted. Optional but nice to have.
• Destroy graph layout before setting new model.

Minor changes

Changes	Description	Screenshot
Reset view should expand all collapsed groups	A quick way to re-expand all collapsed groups. Previously, manual unpacking for each group is required	N/A
Alert and resolver for nodes should be rendered as a vertical list and action button is now inline with sentence	Previously, Flex renders them inline (horizontally) if enough width is available
Destroy old graph before initializing new model	Previously, stale elements are causing a recursive fails on graph layouts	N/A
Set Menu Max Height for filter select menus	Previously, the menu can become very long and overflow the view

[tthvo]

Hey @andrewazores, with these changes, I haven't encountered the issue again. But maybe can you double-check?

[andrewazores]

Related: #1334 (comment)

[andrewazores]

Looks good, the previous issue is not exactly easy to reproduce but this doesn't cause any new apparent issues at least.