[LH2769]: Crash when closing Dictionary Window while in Composition mode.

Reproduced consistently in multiple blank projects. Type a word, enter Composition/Fullscreen mode, then right click on the word and select ‘Dictionary’. Upon closing the pop-up window, Scrivener immediately closes without producing an error message or saving changes to the project.

Reproduced on Windows 10 Home Edition, Scrivener Version Beta (19429) - 20 Nov 2017

Great catch! This has been filed. Thank you!