Remove the graph options from the Preferences

All of these are now set from the toolbar next to the new profile. This
removes functionality for people using the old profile, but as we will rip
that out and switch to the new profile, soon, that seems an acceptable
side effect.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
PrintDialog class cleanup.

* Remove static PrintDialog::instance() method
* Remove void PrintDialog::runDialog() method
* construct/destruct print dialog on demand

Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
DownloadFromDCWidget class cleanup

Remove static DownloadFromDCWidget::instance() method

Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
ShiftImageTimesDialog class cleanup.

* Remove static ShiftImageTimesDialog::instance() method
* Add ShiftImageTimesDialog::amount() member

Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
PrintDialog small improvements.

* Remove closeClicked() slot, and use QDialogs accept() slot
* Simplify QObject::connect call by removing the QObject scope.

Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>