Move "Recalculate Timeline" to be front-and-center button

"Recalculate Timeline" is a bit buried under the menu, which is causing PM's to forget to regularly click when modifying a project plan. Forgetting to recalculate is one of the routine causes of "why is this not working right" questions from PMs.

It would be helpful to move this function to a button right in the project header, or floating with page scroll, so that PM's are more inclined to click it regularly.