Make the "server-manage" view responsive

Description

On small screens, the "server-manage" component has several issues :

• the positioning of the buttons is not correct
• the name of the site goes over the buttons on the card

Files to update

• src/app/ecombox/servers/server-manage/server-manage.component.html
• src/app/ecombox/servers/server-manage/server-manage.component.scss
• src/app/ecombox/servers/server-status-card/server-status-card.component.html
• src/app/ecombox/servers/server-status-card/server-status-card.component.scss