Fix brightness
The brightness slider relies on a very selective emission of changed signals for the slider value to avoid a cycle.
Commit 3d3dca4a broke it by making the slider emit conventional change notifications.
Closes #1500 (closed)
The brightness slider relies on a very selective emission of changed signals for the slider value to avoid a cycle.
Commit 3d3dca4a broke it by making the slider emit conventional change notifications.
Closes #1500 (closed)