Rename pop up within image viewer - remember last position

Within Opus image viewer, when renaming files that contains specific data (like text or dates) that can be used in the file name, one often has to move the rename panel it away so as to see what the image file is about: it floats over the image.
In case of a few images, no problem.

However, with many images to rename, one would wish the rename panel (pop-up) remember the previous position, or even better allow to have it docked at the bottom and leave open until closed.
In case of multiple files, this may lead to a faster 'batch' renaming process:
after [Enter] the file is renamed, then click on [Next] - next file is loaded with old names loaded into the rename panel that is still open, ready to be renamed.