[WIP] Prevent RobotMotion modal from starting in pause when customizing

[amalnanavati]

Describe this pull request. Link to relevant GitHub issues, if any.

There is an ongoing issue where, when customizing a robot arm configuration, sometimes the RobotMotion modal will start out paused. This PR is an attempt to fix that.

Explain how this pull request was tested, including but not limited to the below checkmarks.

The main challenge is that this issue is hard to recreate. I have had greatest success re-creating it when accessing the web interface from my iPhone, and some success recreating it when accessing the web interface (running on the real robot) from the Arc browser on my laptop. I haven't been able to re-create it when running the robot code on my Ubuntu VM.

• Recreate the issue: Find a configuration where the issue can be recreated with high probability, document that here.
• Verify the fix: Pull this branch and run the code, verify the fix works.

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