Log unhandled errors and promise rejections in the desktop app

Test code:

    setTimeout(() => testFunctionSync(), 5000);
    setTimeout(
        () => testFunction().then(() => console.log("done testFunction")),
        10000,
    );

    const testFunctionSync = () => {
        console.log("sleeping not");
        throw new Error("Handle me");
    };

    const testFunction = async () => {
        console.log("sleeping");
        await fs.mkdir("/tmp/foo", { recursive: true });
        console.log("woke up");
        throw new Error("Handle me");
    };

desktop/src/main/log.ts

@@ -19,6 +19,16 @@ export const initLogging = () => {
     log.transports.file.format = "[{y}-{m}-{d}T{h}:{i}:{s}{z}] {text}";
 
     log.transports.console.level = false;
+
+    // Log unhandled errors and promise rejections.
+    log.errorHandler.startCatching({
+        onError: ({ error, errorName }) => {
+            logError(errorName, error);
+            // Prevent the default electron-log actions (e.g. showing a dialog)
+            // from getting triggered.
+            return false;
+        },
+    });
 };
 
 /**