explicit error handling during sign request

Signed-off-by: Uncle Fatso <uncle.fatso@ghostchain.io>

package.json

@@ -1,6 +1,6 @@
 {
     "name": "ghost-wallet",
-    "version": "0.1.4",
+    "version": "0.1.5",
     "description": "Browser extension to manage ghost blockchain light clients.",
     "main": "dist/src/index.js",
     "author": "Uncle f4ts0 <f4ts0@ghostchain.io>",

src/containers/WalletPopup/pages/SignRequest.tsx

@@ -31,9 +31,22 @@ export const SignRequest = () => {
         window.close()
         return null
     }
+    if (isLoading) {
+        return (
+            <Layout>
+                <h1 className="text-3xl font-bold mb-6 px-6">Loading Sign Request #{signRequestId}</h1>
+            </Layout>
+        )
+    }
     const request = signRequests?.[signRequestId]
-    if (isLoading || !request) {
-        return null
+    if (error || !request) {
+        return (
+            <Layout>
+                <h1>Could not parse the sign request #{signRequestId}</h1>
+                <br />
+                Error: {error?.message}
+            </Layout>
+        )
     }
 
     return (