Changes to Preference, Startup Activities and tabs

New Layouts have been implemented for the Preference Activity as well as
the Startup Activity. Tab onPageSelected functionality has been added.
Revert "Changes to Preference, Startup Activities and tabs"

This reverts commit df70d531e3f3c38a471156d86ebe8fbd8041cfa1.
Revert "Revert "Changes to Preference, Startup Activities and tabs""

This reverts commit 8f0e53eab73bef92d00a2868afaecc22000a1f4a.
Changes to Preference,Startup Activities and Tabs

New Layouts have been implemented for both Preference and Startup
Activity as well as tab onPageChange functionality has been added.