Check cursor shape before accepting event for window dragging. This is consistent with what is done for oxygen-qt
Check cursor shape before accepting event for window dragging.
This is consistent with what is done for oxygen-qt

CCBUG: 317292

blueshell-next/carbon-gtk,blue-shell/carbon-gtk,blue-shell/carbon-gtk,KDE/oxygen-gtk,KDE/oxygen-gtk,blueshell-next/carbon-gtk