[sailfish-browser] Update selected text status when cellular is enabled. Fixes JB#37557
[sailfish-browser] Update selected text status when cellular is enabled. Fixes JB#37557

This improves phone number selection. The error that users saw were such that
selected phone number didn't show "Call" icon in the toolbar. The "Call" icon
was shown only after either of the selection handles were moved a bit.

sailfishos/sailfish-browser,sailfishos/sailfish-browser,sailfishos/sailfish-browser,sailfishos/sailfish-browser,sailfishos/sailfish-browser