Disable run button while calculation is running

[eethann]

Time estimate:

Problem: Currently a user can initiate multiple simultaneous calculation requests by clicking the run button multiple times while it's spinning.

Acceptance criteria: The run button should be disabled for clicks while a calculation is running.

[BrianAlderman]

Resolved here: https://github.com/ProjectDrawdown/global-research-platform/pull/74 Unable to link PR to this issue for some reason 🤷