left click (enable/disable) when geoclue fails make it crash

[hmollercl]

When geoclue fails (for example no internet) and icon is left-clicked, app crashes. The error could be better be handled so the app won't crash. redshift-gtk in same situation doesn't crash

[hmollercl]

Just found out that disabling when geocule fils to start crashes in gtk also, the thing is that in gtk the enabl/disable toggle is done in the context menu and not with left click over tray icon. I believe that that solution gives better control over geoclue failure. Also in rs-gtk when it crashes it gives the message that geoclue fails, that message comes from redshift itself.