- Place whole control-cluster further left to be more similar to the
design,
- replace individual attribution of control-wheel-button with
consolidated assignment for easier reading, and
- separate control-wheel and media control groups.
Qt Version 6.7.0 deprecates the QCheckBox::stateChanged() signal in
favor of the QCheckBox::checkStateChanged() signal. This commit handles
the deprecation for later versions while remaining the current
implementation for earlier ones.