add preSetup and postSetup methods to BaseApp for customizations#146

rjackey merged 1 commit intomastermathworks/widgets-toolbox:masterfrom

141-for-app-classes-provide-an-alternative-to-the-setup_internal-method-for-code-to-run-pre-setupmathworks/widgets-toolbox:141-for-app-classes-provide-an-alternative-to-the-setup_internal-method-for-code-to-run-pre-setupCopy head branch name to clipboard