Add FILE_DIALOG_OPEN_FOLDER to CefBrowser.runFileDialog()

[smilefx]

Is your feature request related to a problem? Please describe.
I am trying to open a folder pick dialog using CefBrowser.runFileDialog() but am missing the option to select a folder instead of a specific file.

Describe the solution you'd like
Implement the CefDialogHandler.FileDialogMode.FILE_DIALOG_OPEN_FOLDER-Option which is already available in CEF as far as I am aware.

Describe alternatives you've considered
Using the showDirectoryPicker() JavaScript-Method but this does not return the absolute path.

Additional context

• Availability in CEF: cef_types.h
• Missing Enum-Value in Java-CEF: CefDialogHandler.java
• Missing Implementation in Java-CEF: e.g. CefBrowser_N.cpp