Don't recompute fees after done with swap

src/routes/Swap.tsx

@@ -56,6 +56,7 @@ export default function Swap() {
     const [isConnecting, setIsConnecting] = createSignal(false);
 
     const [loading, setLoading] = createSignal(false);
+    const [done, setDone] = createSignal(false);
 
     const [selectedPeer, setSelectedPeer] = createSignal<string>("");
 
@@ -123,6 +124,7 @@ export default function Swap() {
         if (canSwap()) {
             try {
                 setLoading(true);
+                setDone(false);
                 const nodes = await state.mutiny_wallet?.list_nodes();
                 const firstNode = (nodes[0] as string) || "";
 
@@ -153,6 +155,7 @@ export default function Swap() {
                 setChannelOpenResult({ failure_reason: eify(e) });
                 // showToast(eify(e))
             } finally {
+		setDone(true);
                 setLoading(false);
             }
         }
@@ -220,7 +223,7 @@ export default function Swap() {
 
     const feeEstimate = createMemo(() => {
         // Balance can go down during swap so...
-        if (loading() || !!channelOpenResult()) {
+        if (loading() || !!channelOpenResult() || done()) {
             return undefined;
         }