Merge branch 'jacek-jaskolski-datetime_default_value'

revert(item): revert the change from margin to padding right

this should have been changed for margin, not padding

fix(navigation): fix popTo signature and make usage uniform

fix(navigation): fix null pointer exceptions that would occur when de…

…stroying a nav controller while its transitioning

fix(app): restore getActiveNav api

restore getActiveNav api

chore(generator): remove ionicPage for now (ionic-team#12347)

docs(events): fix syntax error (ionic-team#12317)

Need to access member using `this` keyword outside constructor

fix(select): _inputUpdated should not be called manually

fix(rtl): use multi direction in order to override the default ltr

fix(themes): change default app-direction