I think there is no reason for not execuring the code below

if ((bDouble || bIsTiledRendering) && .... ) { ... }

for both desktop and online.

So since the code for open the clicked URL is below such if
clause, I changed the code so that we return only when it's really a
double click event.

Moreover I reverted back the code for executing the list validation
pop-up to its original place, since there is no more the need to have
it executed in two places.

Change-Id: Idbec2e6e45cd7ee8282005169e1132a11d4cac33
Reviewed-on: https://gerrit.libreoffice.org/54151
Tested-by: Jenkins
Reviewed-by: Andras Timar <andras.timar@collabora.com>