Error page is shown when trying to install Ripple from Google Play
When no panic button app is installed, touching the "Panic Button App" preference automatically opens a market:// link to install Ripple. If the device has Google Play but not F-Droid, a Play Store error page is shown. This may be confusing for the user, as we haven't given any indication that we're about to search for an app on Google Play.
If the device has both Google Play and F-Droid, an app chooser is shown. Choosing Google Play leads to the error page.
