perf(ui): runSequentialPromise() -> never start more threads than supplied number of promises

Author: rstoenescu

ui/src/utils/run-sequential-promises/run-sequential-promises.js

@@ -109,7 +109,7 @@ export default function runSequentialPromises (
     runNextPromise()
   })
 
-  const threads = Array(threadsNumber)
+  const threads = Array(Math.min(totalJobs, threadsNumber))
     .fill(null)
     .map(getPromiseThread)