Add fastscroll to the Manage applications screen

so you don't need to scroll so much if you have alot of apps
and want to go to the bottom of the list.

Change-Id: I96d892abf53a9da784ae1df056558d4fd3cf64f6
Settings: Hide Development settings when it is turned off

This commit hides the Development and Performance settings items
when the user turns off Development settings. This sets things back
to tapping x number of times on the build number to once again enable
developer settings

Change-Id: I6003f73f5abee54bb000f01757ecffe7b68dba59

Settings: Make Perf settings act just like dev setting - start hidden

The Performance settings should not show until the owner of the
device enables development options, guest users should not be able
to turn it on.

Change-Id: Ib08d29bfd92ad44c71d02c115e12064ddf4704e0