Add more bug fixes to README.md

Author: christinaor

README.md

@@ -184,6 +184,8 @@ After cloning this repository, developers can simply run `npm run docs` at the r
 
 -   Search bar now searches for specific nodes successfully
 -   Tab titles of chrome browser tabs not running an application in development mode are no longer affected by Reactime
+-   Multiple black screens fixed
+-   Improved UI and performance
 
 ## <b>Read More</b>