[GTK4] De-couple GtkEntry calls from GtkSpinButton [EBZ#543989] --------------------------------------------------------------- Key: ERT-701 URL: https://issues.jboss.org/browse/ERT-701 Project: Eclipse Release Train Issue Type: Task Components: Platform Reporter: Friendly Jira Robot Priority: Major Labels: 4.11_M3, SWT, bzira GtkSpinButton is no longer a child of GtkEntry in GTK4, but instead just a GtkWidget. In order to make gtk_entry_* calls on them we have to acquire the GtkEntry handle first.