FW: add switch to hide signal and wifi bars (1/2)

Change-Id: I8c2e9112bb28cf56cb55b0f993a4863c7af430be
update statusbar immediately when using hide all signal switch

Change-Id: Id7f48dadbc38d42c2a1522f7551c07e9f587be4a
hide that extra spacer of the mobile group if required

Change-Id: If6a23eb8ed41ce82a9aa60e7158be8bf69725708