Shift-F5 shortcut prints "S-F5" in document

[woutersj]

Mogan Version

1.2.8

Operating System Version and Architecture

Fedora Linux 40 (GNOME Wayland)

Describe Bug

When pressing Shift-F5 to insert a big operator like an integral sign, the characters "S-F5" are inserted in the document.

If subsequently the keyboard shortcut is completed by pressing 'I', "S-F5" is replaced by the integral sign as intended.
If anything else is pressed (that doesn't complete the shortcut sequence) the characters "S-F5" are left in the document.

In the comments on #1450 this is mentioned as being introduced in 65_8.

Expected Behavior

No characters being inserted when Shift-F5 is pressed.