Feature Request: Place Optimize COmplete message

Hello,

I often manage several sites at a time so when I run the optimization I usually move to another tab and then come back. Upon coming back I found it not blatant that the operation was complete. I see that in the verbiage beside each item says what’s done, but the overall action doesn’t indicate when complete;

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Would love just a subtle text added beside the big blue button saying complete or other indicator.

Thank you