Alex Donesky 02c0cbede9 Stop GasFeeController polling when pop closes (#11746) ... * Stop GasFeeController polling when pop closes * Stop estimate gas polling on window unload * lint + comments * Improve client closed logic * lint * Add back _beforeUnload on unmount in gas-modal-page-container * Add full check and call onClientClosed method for notifcation environment * Add gas pollingToken tracking to appStateController and use to disconnect polling for each environment type * remove unused method * move controller manipulation logic from background.js to metamask-controller, disaggregate methods * add beforeunload handling to reset gas polling tokens from root of send page * cleanup, lint and address feedback * clear appState gasPollingTokens when all instances of all env types are closed, fix pollingTokenType arg from onEnvironmentTypeClosed call in metamask-controller * mock new methods to fix tests * final bit of cleanup + comments Co-authored-by: Dan Miller <danjm.com@gmail.com>		2021-08-04 20:24:40 -02:30
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