Another bugfix and small enhancement release!

Fixed

• SmartResize takes invisible columns into account (https://github.com/edvin/tornadofx/issues/889)
• radiomenuitem didn't store value parameter properly (https://github.com/edvin/tornadofx/issues/737)
• fitToWidth/fitToHeigh binds prefWidth/prefHeight instead of minWidth/minHeight properties (https://github.com/edvin/tornadofx/issues/886)
• menu/item builders now observes FX.ignoreParentBuilder
• Renamed labelProperty to textProperty in AbstractField
• Wizard next button was enabled even when current page was not complete (https://github.com/edvin/tornadofx/issues/960)
• App primary view would continue to receive onDock/onUndock after its app instance was stopped and out of scope (https://github.com/edvin/tornadofx/issues/973)

Changes

• Opened up HttpClientEngine and HttpURLEngine for easier subclassing/configuration of the Rest engine
• Deprecated observableList() in favour of observableListOf(), and [List, Set, Map].observable() in favour of [List, Set, Map].asObservable() to be consistent with the Kotlin standard library.
• Subdelegation of workspace button states (https://github.com/edvin/tornadofx/issues/894)
• Kotlin 1.3.20
• Moved all css helper extension functions from Node/Tab/Menu etc to Styleable (https://github.com/edvin/tornadofx/issues/944)

Additions

• FX.messagesNameProvider property to dynamically compute the name of the resource bundle of a given component class. (https://github.com/edvin/tornadofx/issues/872)
• FX.fxmlLocator function to provide custom FXML locations globally
• Added top level functions for creating (observableListOf(), etc) and converting (List<T>.asObservable(), etc) observable lists, sets and maps; and extension functions to work with them too (ObservableList<T>.shuffle(), etc).
• Submenu support for MenuButton (https://stackoverflow.com/questions/54393983/how-to-make-a-submenu-within-a-menubutton-in-javafx)
• Added cubiccurveTo builder (https://github.com/edvin/tornadofx/issues/911)
• onLeftClick() and onRightClick()
• Convenience function builders for SimpleXXXProperty classes (https://github.com/edvin/tornadofx/pull/935)
• Added splitmenubutton builder
• togglegroup() builder accepts property parameter (https://github.com/edvin/tornadofx/issues/956)
• Added extensions and operators for vector math