Add more icon options in MyCalendar TeamLink

[lazo8592]

With reference to the below, I have edited the table added a row for more options other than the default. How do I add (upload) a new icon and match it to the row as I see SVG... links in the icon (don't know how this works.

Apologies - I'd not pushed the code

New look:

So, this worked beautifully :)

Originally posted by @paul-haigh-iaggbs in https://github.com/stuartridout/teamlink/issues/21#issuecomment-1203242642