IP pool list: disable pool delete when there are ranges in pool

[charliepark]

[charliepark]

Crespo covers this in #2751

[david-crespo]

Looks you did that in #2405, but it only covers the IP pool detail page, not the list view:

console/app/pages/system/networking/IpPoolsPage.tsx

Lines 100 to 106 in 1cfb3b2

	{
	label: 'Delete',
	onActivate: confirmDelete({
	doDelete: () => deletePool({ path: { pool: pool.name } }),
	label: pool.name,
	}),
	},

This makes sense because we don't have the lists of ranges on hand for each pool in the list. We could fetch them async so they don't block pageload, and if we only care whether they're empty or not, we could even fetch them with a limit of 1.