Nandroid menu fixes:
- fix memory overflow bug if vold managed volumes reach MAX_NUM_MANAGED_VOLUMES.
- easier editing: this completes previous two commits to clean up Install Zip menu and Advanced menu
fix superuser check for 4.3+ ROMs, credits to Chainfire
Properly apply root to system
v5.19.2
Merge branch 'cm-10.2' of github.com:PhilZ-cwm6/philz_touch_cwm6 into cm-10.2

Merge changes from upstream