QTerminal: Use Qt-wide keyboard shortcut for "Quit"
Expected Behavior
The ususal Qt-wide keyboard shortcut for quitting application works
Current Behavior
Quit has no shortcut at all

Upstream issue opened: https://github.com/lxqt/qterminal/issues/862
Upstream seems unwilling to change this.
Options:
- Fork QTerminal and lximage-qt to do the changes that were rejected upstream (however, I'd like to avoid forking everything for "small" things like these)
- Monkey-patch the shortcuts, possibly using
LD_PRELOADas we are doing in https://github.com/helloSystem/QKeySequenceOverride (is this even possible?) - Maybe @antony-jr has an idea how to do this using a Qt plugin?
- Maybe @jsm222 has ideas?
- Given this bug report maybe @grahamperrin has ideas on this? (In the meantime, I will prepopulate the config file but that really feels not ideal)
We could in fact do this with qt plugins but does QTerminal load style plugins and something like that? or else we have to do some very bad unmaintainable code. Without forking we could maintain a set of patch over the project which can be applied when building.
At least on helloSystem (which is what we are caring about here) we are loading our own style plugin https://github.com/helloSystem/QtPlugin/tree/master/styleplugin for all applications but since we are using Qt Style Sheets, it seems that not much of our style plugin is actually used to do the widget drawing.
This is not super urgent given the workaround that I am using now (shipping a prepopulated config file) but I am interested in learning which options there are and what can or cannot be done using Qt Plugins.
qterminal has a config file with shortcuts just like featherpad..