[Tabs extended] Disabled item borders wrong color on md and sm

[RichKummer]

Detailed description

When an item in the accordion version of Tabs extended is disabled, and the accordion item appears in md and sm breakpoints, the disabled item's top and bottom borders appear as the wrong color. The color of the disabled borders should be the same as the actionable item borders, only the text color and icon color are changed visually (see design specs).

Seen in Chrome in Canary Web Components v1.8.1 (http://ibmdotcom-web-components-canary.mybluemix.net/?path=/story/components-tabs-extended--default_ and the new version of the React wrapper for Tabs extended.

Tabs extended in Canary Web Components v1.8.1

Tabs extended md breakpoint in design specs

Tabs extended sm breakpoint in design specs

It looks like the issue may be these lines of code effecting the disabled item (through Inspect)

Steps to reproduce the issue

1. Configure a disabled item in Tabs extended
2. View in breakpoint md or sm
3. Compare top and bottom border color for disabled item with enabled item

[emyarod]

it seems like these disabled accordion item styles come directly from core Carbon, should this be an upstream change or are we looking to scope it to the dotcom repo?

[RobertaJHahn]

Andrew to investigate as part of Fireline. Will open in Core Carbon and close if it has to be fixed in Carbon.

[emyarod]

this should be resolved when the carbon-components version is upgraded to v10.43.0 to include the upstream fix carbon-design-system/carbon#9543