[GB.GTK]
* NEW: Remove the native SpinBox implementation.
* BUG: Add specific fixes for breeze and oxygen themes.

[GB.GTK3]
* NEW: Remove the native SpinBox implementation.
* BUG: ComboBox: Fix rendering.
* BUG: ComboBox: Use a GtkBox instead of the deprecated GtkAlignment.
* BUG: Style: Fix some paint methods and metric properties.
* BUG: Add specific fixes for breeze and oxygen themes.

[GB.GUI.BASE]
* NEW: SpinBox: New implementation of the control in Gambas.
* BUG: ProgressBar: Fix rendering with GTK+ components.

[GB.QT4]
* NEW: Remove the native SpinBox implementation.
* NEW: RadioButton: Fill the widget when the background color is set.
* BUG: Style: Fix some metric properties.

[GB.QT5]
* NEW: Remove the native SpinBox implementation.
* NEW: RadioButton: Fill the widget when the background color is set.
* BUG: Style: Fix some metric properties.