Recover from renderer failures

The setImmediate is apparently required, according to some old
discussion from Electron, in some older versions (v7?) but
it's not clear it was ever fixed to work in new ones either
and it's hard to reproduce a renderer crash by definition so
let's keep it just to be safe.

Author: pimterry

src/index.ts

@@ -212,6 +212,10 @@ if (!amMainInstance) {
                 "UI crashed",
                 "The HTTP Toolkit UI stopped unexpected.\n\nPlease file an issue at github.com/httptoolkit/httptoolkit."
             );
+
+            setImmediate(() => {
+                contents.reload();
+            });
         });
     });