feat(MenuController): create isOpen() and isEnabled()
feat(MenuController): create isOpen() and isEnabled()

Closes #5390

dennybiasiolli/ionic,cambronjay/ionic,janglednerves/ionic,cambronjay/ionic,janglednerves/ionic,AbraaoAlves/ionic,driftyco/ionic,manucorporat/ionic,manucorporat/ionic,driftyco/ionic,manucorporat/ionic,dennybiasiolli/ionic,joshesp/ionic,janglednerves/ionic,joshesp/ionic,alan-agius4/ionic,TillaTheHun0/ionic,jhlee8804/ionic,manucorporat/ionic,AbraaoAlves/ionic,brianespinosa/ionic2-sass,dennybiasiolli/ionic,TillaTheHun0/ionic,jhlee8804/ionic,jhlee8804/ionic,TillaTheHun0/ionic,jarrodkoch/ionic,jhlee8804/ionic,joshesp/ionic,driftyco/ionic,jhlee8804/ionic,TillaTheHun0/ionic,jarrodkoch/ionic,janglednerves/ionic,manucorporat/ionic,driftyco/ionic,cambronjay/ionic,alan-agius4/ionic,janglednerves/ionic,jarrodkoch/ionic,AbraaoAlves/ionic,alan-agius4/ionic,dennybiasiolli/ionic,jarrodkoch/ionic,cambronjay/ionic,joshesp/ionic,AbraaoAlves/ionic,driftyco/ionic,dennybiasiolli/ionic,jarrodkoch/ionic,alan-agius4/ionic,cambronjay/ionic,AbraaoAlves/ionic,alan-agius4/ionic,alan-agius4/ionic