On the file explorers of Windows and Ubuntu alike, I'm used to the Ctrl+Shift+click shortcut for adding a range of files to the current selection.

I believe most people are familiar with that behaviour, but I will clarify anyway. Suppose I have these files:
A
B
C
D
E
F
G

If I click on file A, then hold Shift and click on file C, my selection is now [A,B,C].
If I then hold Ctrl and click on file E, my selection becomes [A,B,C,E].
If I then hold Ctrl+Shift and click on file G, I expect my selection to become [A,B,C,E,F,G].

This Ctrl+Shift behaviour is the one observed across many applications on different OSs, and I would have expected to find it in Meld too. Meld's dirdiff applies the standard behaviour for Ctrl+click and Shift+click, but Ctrl+Shift+click behaves just like Ctrl+click, i.e. in my above example the last selection is [A,B,C,E,G] instead of [A,B,C,E,F,G].

I get the same behaviour in Meld on both Windows and Ubuntu. I'm not filing this as a bug because maybe it was just never considered to add this shortcut to Meld?

Thanks for your insights,
Tanguy