applets/systemtray: suppress useless tooltips
Reason for the change
A tooltip is useless when its text is 100% identical to the visible text of whatever you're hovering the pointer over. Let's not show them. We'll still show the tooltip if its text is different in any way, just not if it's identical.
Test plan
- Open System Tray expanded view
- Hover over "XWayland Video Bridge" or "Display Configuration"
Bugs fixed
BUG: 494463 FIXED-IN: 6.2.4