RTL UI for stack & manage menu user education

- default start position takes into account RTL
- removed alpha on manage edu UI to match the stack edu UI

Fixes: 158562723
Test: be in RTL, get first bubble => stack edu uses RTL UI & is on right,
      tap on it => manage educaiton is on right
Test: do same for LTR
Test: change layout to LTR & RTL => all expanded views, manage edus update
      direction
Change-Id: I8a482055a54fd306493bbaa96363ef172cf18bb2