[Feature request] Organize dictionaries in groups

[ems299]

Thank you so much for this great app!

I was wondering if it would be a big effort to implement the possibility to organize dictionaries in groups, which then can be activated or deactivated as a whole. This would be helpful when you have many dictionaries and several languages. One could e.g. create groups by language and always activate the language group that is currently relevant. If all the dictionaries are active, the search results often get cluttered with irrelevant entries from other language.