merge for several of VWR-20694's subtasks.

indra/llui/llfloater.cpp

indra/llui/llfloater.h

indra/newview/llsidetray.cpp

indra/newview/llsidetray.h

...fault/textures/taskpanel/Sidebar_Icon_Dock_Foreground.png

...ns/default/textures/taskpanel/Sidebar_Icon_Dock_Press.png

...ult/textures/taskpanel/Sidebar_Icon_Undock_Foreground.png

.../default/textures/taskpanel/Sidebar_Icon_Undock_Press.png

indra/newview/skins/default/textures/textures.xml

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

...a/newview/skins/default/xui/en/panel_avatar_list_item.xml

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

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

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

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

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

...ewview/skins/default/xui/en/panel_group_info_sidetray.xml

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

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

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