Statusbar progress widget: update up/down icon when dialog goes away
Summary:
The two need to always be in sync. The button was still showing "down"
when the dialog went away with a timer.
Since slotToggleVisibility() ends up calling StatusbarProgressWidget::slotProgressDialogVisible
slotProgressButtonClicked() doesn't need to updateProgressButton() directly.
Test Plan: Looking at the button at the end of a sync
Reviewers: mlaurent, dvratil
Reviewed By: dvratil
Subscribers: kde-pim
Differential Revision: https://phabricator.kde.org/D21067