Martin Tobias Holmedahl Sandsmark authored Aug 17, 2021 and Tomaz Canabrava committed Nov 15, 2021

cmatrix (a Matrix-style screensaver-ish) uses a lot of dumb escape
codes, and particularly two we don't want to support from xterm:

    - CSI 22: Save icon and window title on stack
    - CSI 23: Restore icon and window title from stack

For security reasons Konsole is very conservative wrt. not supporting
similar escape codes (and now most other terminal emulators as well,
they discovered it the hard way).