mobile device context menu fails when swipe is enabled

[lazylester]

For example, see the galleria demo at http://web.simmons.edu/~grovesd/comm244/notes/week13/galleria/galleria-demo.html

If you open this demo in your mobile device, the context menu is not triggered by a "long press" user action. A workaround is to declare swipe: false in the options. But of course, we would like both the context menu and also the swipe feature.