Merge #5800

5800: Fix hotkeys (scroll regions) not working in editor r=def- a=Robyt3

Regression from #5795.

## Checklist

- [X] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test (especially base/) or added coverage to integration test
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: Robert Müller <robytemueller@gmail.com>

src/game/editor/editor.cpp

@@ -6303,6 +6303,9 @@ void CEditor::OnUpdate()
 		Reset();
 	}
 
+	for(int i = 0; i < Input()->NumEvents(); i++)
+		UI()->OnInput(Input()->GetEvent(i));
+
 	// handle cursor movement
 	{
 		static float s_MouseX = 0.0f;