FioriLaunchpad.html

sap ui5, Shell

Where you can find it:
use se80, bsp application /UI2/USHELL

add button to user interface:

zFioriRenderer.getRenderer = function(){
zFioriRenderer.renderer = sap.ushell.Container.getRenderer("fiori2");
if(!zFioriRenderer.renderer){
setTimeout(zFioriRenderer.getRenderer, 1000);
}else{
zFioriRenderer.helpBtn.button = new sap.ushell.ui.shell.ShellHeadItem( {
icon: "sap-icon://sys-help",
tooltip: "Вызов справки",
press: zFioriRenderer.helpBtn.helpFunc
});
jQuery.sap.getObject('sap.ushell.renderers.fiori2.RendererExtensions').addHeaderEndItem(zFioriRenderer.helpBtn.button);

zFioriRenderer.helpBtn.button = zFioriRenderer.renderer.addActionButton("sap.m.Button", { id: "favBtn",
text: "Фавориты",
tooltip: "Добавить на главную",
icon: "sap-icon://add-favorite",
press: zFioriRenderer.favBtn.favFunc }, true, false, ["app","home"]);
}
};

zFioriRenderer.getRenderer();

more information about add button you can find on api.