Alt-Click to Quick-Move
Hi.
Using a brush, a CTRL + L-Click would instead use the dropper and appropriate the current color that is clicked on.
Why not add ALT + L-Click that would also allow you to move the selected layer, and also jump to it?
This will allow users to quickly navigate between layers by just a simple click. There may be a feature of this already, I am not well versed in GIMP, but it would be useful if there isn't one.