style(Authoring Tool): Disable tab animation in unit list

[Aaron-Detre]

Changes

• Disabled the Unit Library tab switching animation.

Test

• Switching tabs should not trigger the animation.

Closes #2322

[qltysh]

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[hirokiterashima]

The original task (#2322) was to disable the animation when switching tabs between "My Units" and "Shared Units" in the authoring tool.

This is for the tabs in the curriculum library page (toggle "Public" and "My Units"). Since disabling tab animation is also needed in this page, let's keep it. But can you add to this PR to handle the tabs in the authoring tool?