Remove lockscreen slide delay option (1/2)

Also enable these options for insecure lockscreen:
* Lock after timeout
* Power button instantly locks
* Owner info

Change-Id: I7737dc9cb1108f7d83b2cea3af9eb313767eb958
Cleanup lockscreen security settings

Since we moved lockscreen security settings to a separate fragment,
these changes we have initially made are not longer needed

Change-Id: Iac07850e974e9ea423fd8908ce1e134a9a2508ef
Remove 'More device settings' menu

Change-Id: I86cd84f6f6c408b26c04d92529e9a031c4fed1f7
Merge remote-tracking branch 'github/cm-11.0' into cm-11.0