Leftmouse select option doesn't work with "Emulate 3 button mouse" option. The latter maps middle mouse to ALT+leftmouse, frustrating loop select for example. Add tooltip to say this, made option to disable automatic on load (version check) and made buttons redraw to show option being disabled. Note; wrapping middle mouse to ALT+RMB will frustrate 1 button mices... the current code for leftmouse-select is a hack at best, better do this good when we have proper event handlers system.