Wrong icon set in some applications

Hi,

I noticed in several applications that the icons are not the default ones of these applications, as can be seen on other distributions.

A picture is worth a thousand words (here for Geany):

https://fichiers.i-services.be/forum/image1.png
https://fichiers.i-services.be/forum/image2.png

Is it possible on Slackware KDE to have the same set of icons as on other Linux distributions?

Thanks

Olivier