Error in 4.1 when calling getView() on viewer

[aszenz]

Bug Report

No table set error on calling getView on hidden viewer tabs in @perspective-dev/workspace.

Steps to Reproduce:

1. Create a perspective-workspace with multiple viewers in tabs
2. Save the workspace config
3. Restore it
4. Call this js

const hiddenWidget = workspace.getAllWidgets().find(w => w.node.classList.contains('lm-mod-hidden'));
const view = await hiddenWidget.viewer.getView(); // Throws: "No table set"

Expected Result:

Calling getView() on hidden tabs worked fine in 4.0, so I would expect that to work here too or an alternative method.

My use case is to fetch data from all the views in the workspace and export them.

Actual Result:

Uncaught (in promise) Error: No table set
    at e.wbg.__wbg_new_a7442b4b19c1a356 (VM81 index-e2eY0UId.js:3:42384)
    at VM90 009971b2:1:1546462
    at VM90 009971b2:1:1128898
    at VM90 009971b2:1:1042638
    at VM90 009971b2:1:562175
    at VM90 009971b2:1:815156
    at VM90 009971b2:1:1656843
    at jF (VM81 index-e2eY0UId.js:3:1931)
    at s (VM81 index-e2eY0UId.js:3:781)
e.wbg.__wbg_new_a7442b4b19c1a356 @ VM81 index-e2eY0UId.js:3
$func4708 @ VM90 009971b2:1
$func2043 @ VM90 009971b2:1
$func1612 @ VM90 009971b2:1
$func556 @ VM90 009971b2:1
$func897 @ VM90 009971b2:1
$__wasm_bindgen_func_elem_18169 @ VM90 009971b2:1
jF @ VM81 index-e2eY0UId.js:3
s @ VM81 index-e2eY0UId.js:3

Environment:

For JavaScript (browser):

• @perspective-dev/client version = 4.1
• Browser and version = Chromium 144
• OS = Linux

Additional Context:

In Perspective 4.1.0, commit d9f69fd introduced a visibility check in restore_and_render.rs that skips view creation for hidden elements:

perspective/rust/perspective-viewer/src/rust/model/restore_and_render.rs

Lines 96 to 98 in b5f3732

	if !presentation.is_visible() {
	Ok(None)
	} else {