small improvements to student home page

src/app/members/members-routing.module.ts

src/app/members/members.component.ts

...t-home/projects-overview/projects-overview.component.html

src/app/members/student-home/student-home-routing.module.ts

src/app/members/student-home/student-home.component.html

src/app/members/student-home/student-home.component.ts

src/app/members/student-home/student-home.module.ts

...udent-home/visits-overview/visits-overview.component.html