Fix virtual cursor "jumping" after disabling/reenabling when a canvas scaler is applied by also applying the scaling on enable

[Tak]

Description

Situation: You have a canvas with a canvas scaler and you're using the virtual mouse pointer.
If you disable and reenable the pointer, it will "jump", because, although the screenspace position is scaled correctly* in UpdateMotion(), it is not scaled when setting the anchored position in OnEnable()

Testing status & QA

Steps to reproduce:

• Set up a canvas with a virtual mouse pointer and a canvas scaler
• Add a script that disables and reenables the virtual mouse pointer component
• Expected: When reenabled, the virtual mouse pointer is at the same position it was when disabled
• Actual (before): The virtual mouse pointer is warped to a different position
• Actual (after): When reenabled, the virtual mouse pointer is at the same position it was when disabled

Overall Product Risks

• Complexity: low
• Halo Effect: low

Comments to reviewers

[cla-assistant-unity]

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