Refactor views/settings/index.vue to be more component based

[speza]

Refactor settings/index.vue to be more component based

Currently the settings view is all in a single Vue file - views/settings/index.vue.
This is an anti-pattern of using a component based frontend library.

I imagine there are other areas of the client code-base that are the same (this just happened to be the one I was in).

Examples of new components to build out of index.vue:

• ManageUsers.vue
• UserTable.vue
• CreateUserModal.vue

Its much nicer to manage and maintain when like this 👍