P: Move [Done] Button from beneath Histogram back to Toolbar [T]

Since the v12 , the crop apply button that used to sit lower right of image is gone ?

The Edit button only requires one click, and does the same thing as the Done button.

Clicking on the Edit button is a one click, accomplishes the same thing as Done.

I too would like to see this button back.  Removing it is abitrary and pointless.

Space for the button is still there and it's a change in workflow after years and years of using LRC.  Yeah, I can double click enter, or double click the actual button to finish but Done was one click and muscle memory.

Bring it back!

Like @Per Berntsen already showed, this is the 'Mask 2.0' button. Get used to it, it's not that difficult.

Click the new Edit icon below the histogram to exit any tool.

To exit the Crop tool, you can also press R or Enter or Esc.

To exit the Healing tool, you can also press Q or Enter or Esc.

To exit Red eye correction, you can also press Enter or Esc.

To exit Masking, you can also press Shift+W, or Enter or Esc once or twice. Alternatively, press K or M once or twice.