* Implemneted saving the plugin bundle on the file store upon plugin upload
* Fixed compilation error
* Fixed compilation issue
* Added deletion from file store upon plugin uninstall
* Added condition to delete from store only when exists. Added case of saving the bundle to the store when uploading from url. Added checks in plugin tests
* Fixed compilation error
* Moved storage of plugin bundle within app/installPlugin
* Moved storing to filestore before enabling the plugin
* Fixed error handling
* Code styling improvements
* Minor styling fix
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