Add email to support dropdown

[joanagmaia]

Changes proposed ✍️

• In svg.vue update xlink:href to href. xlink:ref is deprecated https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/xlink:href
• Remove default fill from svg paths in crowd-icons.svg. This was preventing me from customizing the fill color on hover. I've passed the default. I've passed the default color to use, except for Google icon
• Add Email/Contact us menu item to Support menu
• Update Support menu according to Nuno's feedback
• Update support anchor placements to allow all menu item to be clickable

• Screenshots (front-end changes only)

    - ...  
  

Checklist ✅

• Label appropriately with type:feature 🚀, type:enhancement ✨, type:bug 🐞, or type:documentation 📜.
• Tests are passing.
• New backend functionality has been unit-tested.
• Environment variables have been updated
  • Front-end: frontend/.env.dist
  • Backend: backend/.env.dist, backend/.env.dist.staging, backend/.env.dist.staging.
  • Configuration docs have been updated.
  • Team members only: update environment variables in Password manager and update the team
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.
• All changes have been tested in a staging site.
• All changes are working locally running crowd.dev's Docker local environment.

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[mariobalca]

Looks good to me!
Will merge ✌️