Moreover, whenever I open a dialog box in PS, the Selective Tool disappears and re-appears when I close it. This is distracting. Imagine all PS panels working this way ! Please leave it opened once and for all like any other panel.
Edit : Even opening the Windows Start menu, using Alt-Tab or other usual tasks make the Selective Tool panel disappear (and re-appear). This is not only distracting but also rather irritating, especially on a dual monitor configuration where the PS panels are showing on the secondary display and are almost always visible.