I agree this is a great idea and I think it's even something the product team are already considering. If you are an authorized support contact, you should submit this as an idea to the Innovation Lab to help it get a little more traction.
Before submitting a new idea to the Innovation Lab, try searching for an existing idea to add your vote to. Multiple ideas on the same topic with just a few votes don't get the attention that one idea with a lot of votes gets.
This one does have an idea - I forgot I submitted it myself! It's not currently planned on its own, but sounds like it will be included in a larger enhancement of the time management tools
Speaking of timesheet ideas, @Jeremy Flores‚ can these two ideas be merged to combine their votes?