(iOS) Clean up and refactor apple/iOS/browser.m. All of the file management actions are accessed by long pressing a list entry rather than an accessory button.
(Apple) Objective C refactoring:
	All properties are marked (nonatomic)
	All table view cell reuse identifiers are now constant string objects.
	Where appropriate all calls to [RetroArch_iOS get] are replaced with self.navigationController.
	All calls to objc_setAssociatedObject use proper keys rather than string literals.