Dirty role determination in UI

[roscisz]

Initiated in #296:

in TheLogin.vue:

TensorHive/tensorhive/app/web/dev/src/components/TheLogin.vue

Line 261 in 0680d1a

var role = object.user_claims.roles.length === 2 ? 'admin' : 'user'

If further down the road we'd ever want to add more roles, this could lead to some annoying to troubleshoot errors, when user with any two roles is treated as an admin.