|This function is protected, and cannot be called from insecure code while in in combat.
Changes the current action button to the one specified in the arguments.
- Numer - Which page of your action bar to switch to. Expects an integer 1-6.
- Notifies the UI that the current action button set has been updated to the current value of the CURRENT_ACTIONBAR_PAGE global variable.
- Will cause an ACTIONBAR_PAGE_CHANGED event to fire only if there was actually a change (tested in 2.3.0).