This makes the dialog more modular, and it takes no parameters
instead of two. This is in the preparation of making
the classes more independent on each-other's states, which is very
important. Also, this follows the Android way of workflow better,
since there is no "wrapper" class around the dialog, but instead
the dialog is called directly.

Change-Id: I7571480a040efaf202fae3929cfe76d65c19653e
Reviewed-on: https://gerrit.libreoffice.org/33086Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Aleksandar Stefanović <theonewithideas@gmail.com>