Color/disabled mixins removed properties from the api docs

[willshowell]

Bug, feature request, or proposal:

Docs bug

What is the expected behavior?

A component that implements CanDisable or CanColor should still show color and disabled as valid properties with descriptions in the component's api reference.

Reproduction

Checkbox implements both, but has no reference: https://material.angular.io/components/checkbox/api

[devversion]

Yeah this is a known issue. We need to see if we can somehow get a Dgeni processor that properly handles mixins

[jelbourn]

@devversion we could alternatively try to pull the properties from the interface (e.g. CanDisable)

[willshowell]

@devversion have you had the chance to look into this? Looking at the dgeni-packages CHANGELOG, it looks like there have been some improvements to how implements and extends work, but I'm not familiar enough with Dgeni to know if they're valuable.

EDIT: I see that #6947 upgrades the version. Maybe something to revisit after that lands.

[devversion]

@willshowell Yeah that's the plan. Just wanted to upgrade everything and revisit this afterwards.