Revoking an invite – should confirmation banner be red or green?

I’m working on a feature where a user can send/invite other people to their organization:
The user can opt to revoke the invite. Once this action has been done, I’d like to display a confirmation banner.
Since this banner is successfully …
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Edit an existing GCal invite

I have an application that allows the user to send out a GCal invite. Within the page, there is a button that says, "Create GCal invite."
For the time being, to keep the scope small, this button just links out to a GCal invite pa…
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Uploading and categorizing files thereafter – What is the best way to upload these files?

We are building a feature where users can upload their files.
Idea (A):
Because multiple files can be uploaded by the user, one idea was to use a drop zone. The user is able to select a Category even if uploading is still in progress becau…
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What would be a standard indicator for a selection set to default?

I have a table with different user options.
These options are either coming from a base template (Standard), a customized base template (Custom), or a customized base template that has not yet been published/finalized (Draft).
From these …
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What is a standard way of setting something as default?

I have a list of items a user can pick from. From this list, the user can set a default item. What would be the standard pattern for doing that?
Ideas – star an item, add a "Default" badge next to it, any other ideas?