Update CHANGES, close #279

ui/CHANGES.md

@@ -1,6 +1,7 @@
 #### Version: 1.4.0 (LibGDX 1.9.6)
 - **Added**: [#259](https://github.com/kotcrab/vis-editor/issues/259) `VisImageTextButton#setGenerateDisabledImage(boolean)` along with getter, added `VisImageButton#isGenerateDisabledImage`
 - **Added**: [#260](https://github.com/kotcrab/vis-editor/issues/260) `FileChooser#setDefaultFileName(String)`
+- **Added**: [#279](https://github.com/kotcrab/vis-editor/issues/279) `ToastManager(Group)` constructor
 - **Fixed**: [#255](https://github.com/kotcrab/vis-editor/issues/255) Custom cursor handling in `VisSplitPane` and `MultiSplitPane`
 - **Fixed**: [#262](https://github.com/kotcrab/vis-editor/issues/262) `FileChooser` was not updating selected file list when text was cut or pasted into file name field 
 - **Fixed**: `FileChooser` file name suggestion menu was not updating file name field when navigating suggestion list using arrow keys