EXP-1149 FIX Log in Screen: Replace the new mode selector with the old one

indra/newview/llpanellogin.cpp

indra/newview/llpanellogin.h

indra/newview/llstatusbar.cpp

indra/newview/llstatusbar.h

indra/newview/skins/default/xui/en/panel_login.xml

indra/newview/skins/default/xui/en/panel_navigation_bar.xml

indra/newview/skins/default/xui/en/panel_status_bar.xml

indra/newview/skins/minimal/xui/en/main_view.xml

indra/newview/skins/minimal/xui/en/panel_login.xml

indra/newview/skins/minimal/xui/en/panel_navigation_bar.xml

indra/newview/skins/minimal/xui/en/panel_status_bar.xml