A simple request that will spare the fingers of many photoretouchers from useless pen clicks or spamming Ctrl+D to deselect after using the Patch Tool.
Basically, add a little checkbox to the toolbar when the Patch Tool is selected that says "Auto-Deselect". While checked, after dragging your selection to patch it, it will be automatically deselected afterwards.
This deselection will NOT be counted as a separate history step, so using Ctrl+Z once will undo both the deselection and the patching, leaving the user with only their selection, if they are dissatisfied with the result and want to patch again.
Another reason for it to be counted as only one step is to allow for the use of the "Fade" command (Ctrl+Shift+F) that is impossible if the patching and deselection are two separate steps.