Add a button to clear all simulations

[glutanimate]

It could be convenient to have a quick way to start from a clean slate after running multiple simulations in series.

[giovannihenriksen]

I considered this, but I was afraid that the dialog would become a bit clogged with more buttons. Also, people could accidentally click it instead of the other button and have all their simulations cleared. Let's see if more people request this.

[glutanimate]

I can definitely see where you're coming from.

Two solutions I can think of:

• Add a confirmation dialog on pressing the "clear all" button (though that would still have us add an additional button)
• Make the "clear last simulation" button serve both purposes: We could have it clear all simulations if the user clicks it while holding shift. Discoverability would not be great with this, but we could add a note on this to the button's tooltip (and the docs/changelog of course)

[enrico3]

I second this request. I would prefer a 'clear all' button over 'clear last'. Also, I don't see a problem with the two button alternative. In my opinion the word 'simulation' is not needed in the button(s) text(s).