Hey Amreen,
First of all thanks for your idea!
I understand your scenario and, although I don't agree with a refresh button, it would definitely makes sense to have the application list to be refreshed when a new application is installed/removed/etc from the enviroment.
Despite this, and since this is not that often, currently we don't have plans to do this in the short term but I'll keep the idea to be re-considered in the future.
Thanks for your idea and keep them coming!