SUMMARY

On Slackware64 14-current, after a recent KDE upgrade, in icon mode with (and to an extent also without) previews Dolphin has way too much whitespace, more than icons.  White space is about 1.5 icons between each (horizontally.)  I used to be able to have 48 icons at a certain size; now at same size it's 25.  This is extremely poor for looking through directories/folders with lots of files/folders because it takes basically twice as long... if it was big enough to take a couple minutes, now it takes four or more minutes.  When I used to have 12 to 16 subject folders at the top of my /home/user in two rows, then a row or so usual/main files/images, that is no longer possible and now has to take virtually the entire space, leaving little/no room for many other files I  sometimes work on.  I can still get seven (not eight) across at tiny sizes (that used to have 10+ across at that size) but then the icons are too small to view/read easily.

STEPS TO REPRODUCE
1. Open dolphin
2. Expect normally-/classically-/densely-spaced icons
3. Icons are spread very far apart (horizontally)

OBSERVED RESULT

Icons are spread way too far apart (horizontally) to be as useful in many instances.

EXPECTED RESULT

Icons could be densely-spaced (horizontally) or allow that as one of options.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Slackware 14-current/5.20.4
KDE Plasma Version: 5.20.4
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2