Add "My E-Mail addresses" and "My projects" to top navigation

Add to top navigation: My E-mail addresses (/user/email-addresses.xhtml) My projects (/project/index.xhtml)

Changes in: /bwreg-webapp/src/main/webapp/template/left-side-bar.xhtml edu.kit.scc.webreg.bean.HeadBarBean

Make visibility of links configurable in application config (/admin/config/index.xhtml) like: <h:panelGroup rendered="#{headBarBean.getOrDefault('show_local_logout', 'false').equalsIgnoreCase('true')}">