allow editing applications menu or otherwise lowercase option when correct
Unfortunately modern graphical user interfaces (GUI) were standaradized by American college/university dropouts (early Apple, Windows) not British English experts, and it shows very badly in every commercial OS and probably all POSIX-based GUIs. In proper British (and even all international & American) English the case is only proper nouns are capitalized, which include people, and geographic locations that have names, and a few other things (titles of texts, books, magazines, articles, academic papers, and some new inventions that become acronyms or aren't copied yet, such as are by one organization/research/company group, and usually any formal organizations themselves). There are almost no other exceptions of which one is words which can be academic subjects only within academic context but not non-academic context.
No literate person would seriosuly write in a paper/article/book 'I went to My Garage to get My Hammer and My Saw and My Drill and Some Wood and Some Nails and used My Workbench to Make My Project' because it's simply among worst possible grammar... nevertheless, this style was wrongly started by early Apple & Windows and then large number of people ignorantly copied.
So of course most my user directories/folders--as all currently non-academic--are lowercase, and I'd like all my application main menu entries of categories & miscellanous/utilities & settings be proper lowercase also (I don't use Thunar but same would be true there and for all user directores/folders unless in academic usage). Every submenu contains programs including some unique with their own formal literary/scientific work names, but also many of UNIX origin or imitation that if you read command-line are lowercase, because command-line users don't want too many <SHIFT> presses and in many cases there were several historical versions of a program so they're now generic/topic/subject/category nouns--no longer proper nouns... all such ones users should be able to have lowercase (even things like 'run program', 'terminal emulator', 'file manager', 'mail reader', 'web browser', 'log out' are generic tool categories incorrect to capitalize (exactly same as discussing tools one paragraph above) except specific cases such as 'XFCE Terminal Emulator'... if 'About XFCE' was a document capitalization would be correct but doesn't open to a document though contains an 'About' document so I'd have to ask literary MA-/MSc or higher experts I know... I know what I'm talking about because was able to tutor for USA college/university AA/ASc/minor including what's in beginning BA/BSc English level though haven't memorized as much as people who complete those or lived longer in Britain but would've been able to tell you all the above after my first school year/class/grade in Greater London Built-up Area, England, UK).
In such cases of generic categories & programs (other than unique programs names such as Xfce Terminal (I'd rather see full uppercase XFCE), Thunar, and if you have a unique text-editor/word-processor?) lowercase should be default because has been teaching Millennials and younger atrocious grammar.