[applets/systemtray] Fix size of grid on really thick panels
Now the grid can have more than 2 rows/columns on really thick panels, just like in Plasma 5.19 and earlier.
BUG: 427251 FIXED-IN: 5.20
Now the grid can have more than 2 rows/columns on really thick panels, just like in Plasma 5.19 and earlier.
BUG: 427251 FIXED-IN: 5.20