馃崚 XlibNotifications: port to modern signal-slot
To prevent orphaned slots from being activated.
BUG: 426937 CCBUG: 473262 FIXED-IN: 5.27.8 (cherry picked from commit 5de6a801)
To prevent orphaned slots from being activated.
BUG: 426937 CCBUG: 473262 FIXED-IN: 5.27.8 (cherry picked from commit 5de6a801)