Added the warning about dead ends when selecting starting point, images and bolding for tabs and buttons in messages.
Added the warning about dead ends when selecting starting point, images and bolding for tabs and buttons in messages.

mikebryant/rapid-router,CelineBoudier/rapid-router,CelineBoudier/rapid-router,CelineBoudier/rapid-router,mikebryant/rapid-router,mikebryant/rapid-router,mikebryant/rapid-router,CelineBoudier/rapid-router