Steps to reproduce:
1. New Impress, draw a ractangle;
2. Tools - Color Replacer. Do anything you could trying to replace the color.
"Replace" button is not clickable at all.
"Replace" button is clickable when you have set the "Source color" and "Replace With" color.
Build ID: 9af3d21234aa89dac653c0bd76648188cdeb683e
Build ID: 8fd0451cc08e6a5310bed8b7ad1c46b93c1c6889
Build ID: d6cde02
("oldest" in bibisect-42all repo).
This also happens in Draw. A further search in bugzilla points me to bug 86608.
(Bug 86608 says currently "color replacer" only works for images, not shapes)
Set as duplicate.
*** This bug has been marked as a duplicate of bug 86608 ***
*** This bug has been marked as a duplicate of bug 55592 ***