It is possible to select a full line in the xtrace.
with :nth-child() css selector. Yo will have to be sure it will always be on the same spot though.
.ia_timeMarker > g > g > g > g:nth-child(2) for the first text +1 for every below
For something so specific you should add in the styleclass infront too.
.psc-folder\/styleclassName infront and add an (empty) styleclass with the name folder/styleclassName to the component like normal
( / of folders are changed to \/ in css ) (psc- gets added by igntion)
.psc-folder\/styleclassName .ia_timeMarker > g > g > g > g:nth-child(2)