[remux] remux SIGSTOPs all processes with "xochitl" in the command line

[Bulkin]

To reproduce, run strace awk "xochitl" (e.g. from ssh). When remux is being displayed, the process is backgrounded with [1]+ Stopped(SIGSTOP) strace awk "xochitl".

Same thing with "koreader" or any other name on the app list.