• Checked for duplicates

Describe the bug

In TGMainWindow, if I call:
gVirtualX->GrabKey(GetId(), gVirtualX->KeysymToKeycode(kKey_c), kKeyControlMask, kTRUE); //capture CTRL+C
and press CTRL+C, it never reaches the HandleKey function.
If I instead call:
gVirtualX->GrabKey(GetId(), gVirtualX->KeysymToKeycode(kKey_c), kAnyModifier, kTRUE);

it reaches the HandleKey function:
event->fState = 20, event->fState & kKeyControlMask = 4

This is also the reason why some of TRootGuiBuilder shortcuts are not working.

Expected behavior

GrabKey works well with kKeyControlMask on TGX11.

To Reproduce

1. new TRootGuiBuilder
2. Press CTRL+N
3. It does not do anything

Setup