A function "clearSelectTokenAddress" to reset to the fallback value for token addresses

[hardingjam]

<div class="mb-4 flex flex-col gap-2">
	<Label class="whitespace-nowrap text-xl">{token}</Label>
	<Input
		type="text"
		on:input={async ({ currentTarget }) => {
			if (currentTarget instanceof HTMLInputElement) {
				if (!gui) return;
				try {
					await gui.saveSelectTokenAddress(token, currentTarget.value);
					error = '';
					selectTokens = gui.getSelectTokens();
					gui = gui;
				} catch {
					error = 'Invalid address';
				}
			}
		}}
	/>
	{#if error}
// Handle invalid addresses by falling back to the default/fallback address?
		<p class="text-red-500">{error}</p>
	{/if}
</div>